Frequent internet drops for months

Hello,

Last year we moved into our current house and there were never any lines ran for Comcast. We paid Comcast and in May of this year the cables were ran. I purchased my own modem (Nighthawk CM1200) and router (Nighthawk RAX200). Everything was working flawlessly for the first 2 months, no issues whatsoever. Then, we started experiencing intermittent drops in our internet maybe once a day or so. Not enough to make a big deal about. Then a couple weeks later we noticed that it was doing it more frequently. I contacted Xfinity support and the agent told me their were no problems on their end. Thinking it might have been hardware, I swapped my equipment with my old modem/router (Netgear AC1900), and that didn't resolve the issue. I contacted the support again and scheduled for a tech to come out. After he came, he said he couldn't find any problems, so he'd have to put a work order in for a maintenance tech to come out and check the connections at the pole. 3 weeks later and we heard nothing. I contacted customer support again and they said there was no record of a work order put in, but that they'd send another tech out to check it out. the 2nd tech came and said he removed a filter and ran a new ground cable, but wasn't confident that he fixed the issue and told me to schedule another appointment, as they'd have to send a supervisor out in that case. I scheduled the appointment like he said and they were scheduled to come out Sunday (10/16). I also, out of desperation, bought another modem (Nighthawk CM2000) as everyone at Xfinity seemed to believe that the lines coming to the house are fine, so it must have been a hardware issue. Thursday a van pulled in from Xfinity and the gentleman said he was new with that facility and didn't have a route yet so they were just sending him on appointments. He replaced the coax cable coming from the box on the side of my house to my modem. He explained that when the internet was first installed, they reused the coax cable from the box that was originally a cable ran for our old dish network satellite and that that can sometimes cause issues. After he replaced it, it ran the best its been in a while. still not perfect, but better than it had been.  Sunday came along and 3 techs came to the house. I'm not sure what they did but after they left, our internet is the worst it's been so far.

I've been looking at the event logs on my modem and see a lot of critical errors. "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing", "No Ranging Response received - T3 time-out" are the main 2 I see frequently. I don't know how to share the screenshots from that but I can send the frequency info I found. After 4 techs came out and spending hundreds of dollars on new quipment, I dont know where to go from here. Any help would be greatly appreciated. Thanks in advance

Startup Procedure
Acquire Downstream Channel: 561000000 Hz  Locked
Connectivity State:          OK       Operational
Boot State:                  OK       Operational
Security:                   Enabled   BPI+
IP Provisioning Mode:       Honor MDD   IPv6 only

Downstream Bonded Channels
Channel LockedStatus Modulation ChannelID  Frequency     Power    SNR   Correctables Uncorrectables     
      1     Locked     QAM256     30     561000000 Hz     4.8     42     3415     3220
      2     Locked     QAM256     14     471000000 Hz     5     42     6656     6897
      3     Locked     QAM256     15     477000000 Hz     5     42     5527     8757
      4     Locked     QAM256     16     483000000 Hz     5.2     42.1     4011     4960
      5     Locked     QAM256     17     489000000 Hz     5.2     42.2     2823     1847
      6     Locked     QAM256     18     495000000 Hz     5.1     42.2     3954     4551
      7     Locked     QAM256     19     501000000 Hz     5     42.2     4153     4966
      8     Locked     QAM256     20     507000000 Hz     5.1     42.2     3915     4550
      9     Locked     QAM256     21     513000000 Hz     5     42.2     3864     4925
     10     Locked     QAM256     22     519000000 Hz     4.9     42.1     3698     4814
     11     Locked     QAM256     23     525000000 Hz     4.7     42.1     3695     5211
     12     Locked     QAM256     24     531000000 Hz     4.8     42.1     3949     4805
     13     Locked     QAM256     26     537000000 Hz     4.7     42.1     3736     5182
     14     Locked     QAM256     27     543000000 Hz     4.6     42     3990     5210
     15     Locked     QAM256     28     549000000 Hz     4.6     41.9     3940     4534
     16     Locked     QAM256     29     555000000 Hz     4.6     42     3902     4973
     17     Locked     QAM256     31     567000000 Hz     4.8     42     3903     4822
     18     Locked     QAM256     32     573000000 Hz     4.8     42     3732     4367
     19     Locked     QAM256     33     579000000 Hz     4.5     41.8     3936     5428
     20     Locked     QAM256     34     585000000 Hz     4.5     41.8     3879     5152
     21     Locked     QAM256     35     591000000 Hz     4.1     41.5     4208     4950
     22     Locked     QAM256     36     597000000 Hz     4.1     41.4     4463     6090
     23     Locked     QAM256     37     603000000 Hz     3.7     41.3     4488     5465
     24     Locked     QAM256     38     609000000 Hz     3.6     41.3     4713     5488
     25     Locked     QAM256     39     615000000 Hz     3.4     41.2     5026     5397
     26     Locked     QAM256     40     621000000 Hz     3.4     41.2     5117     6419
     27     Locked     QAM256     41     627000000 Hz     3     41     5621     7283
     28     Locked     QAM256     42     633000000 Hz     3     41     5301     6064
     29     Locked     QAM256     43     639000000 Hz     2.8     40.9     5934     6601
     30     Locked     QAM256     44     645000000 Hz     2.7     40.8     5695     7150
     31     Locked     QAM256     45     651000000 Hz     2.6     40.7     6205     6574
     32     Not Locked     Unknown      0     0 Hz     0.0     0.0     0     0

Upstream Bonded Channels
Channel   LockedStatus  ChannelType ChannelID   SymbolRate        Frequency       Power     
      1       Locked       ATDMA     37       5120 Ksym/sec       16400000 Hz       36.0 dBmV
      2       Locked       ATDMA     38       5120 Ksym/sec       22800000 Hz       36.0 dBmV
      3       Locked       ATDMA     39       5120 Ksym/sec       29200000 Hz       36.5 dBmV
      4       Locked       ATDMA     40       5120 Ksym/sec       35600000 Hz       36.8 dBmV
      5       Not Locked       Unknown      0       0       0       0.0
      6       Not Locked       Unknown      0       0       0       0.0
      7       Not Locked       Unknown      0       0       0       0.0
      8       Not Locked       Unknown      0       0       0       0.0

Downstream OFDM Channels
Channel   LockedStatus  ProfileID  ChannelID    Frequency       Power       SNR/MER    ActiveSubcarrier    Unerror    Correctable   Uncorrectable
      1     Locked     0 ,1 ,2 ,3     25     672000000 Hz     1.98 dBmV     39.6 dB     1108 ~ 2987     22191960     22162482     11204
      2     Not Locked     0      0     0 Hz     0 dBmV     0 dB     0 ~ 4095     0     0     0

Upstream OFDMA Channels
Channel   LockedStatus    ProfileID    ChannelID    Frequency       Power
      1     Not Locked     0      0     0 Hz     0 dBmV
      2     Not Locked     0      0     0 Hz     0 dBmV