Why am I not Getting Advertised Speeds on 2GB Plan?

I've been having a lot of buffering issues while streaming recently so I decided to upgrade my plan from 500Mbps to the 2GB plan. My download speeds remain pretty much the same  as before the plan upgrade, average 450-550Mbps. Only my upload speeds have increased to around 300Mbps. I purchased and installed a NETGEAR CM3000 before I upgraded my plan.  Here's my modem cable diagnostic information. 

Cable Diagnostic

Status: Good

Action:
Your setup looks fine. If you can't access the internet, make sure you properly activated the modem. If modem has been activated and you still can't access the internet, contact your service provider for troubleshooting help.
If you can access the internet but has other internet issue, the Netgear Cable Knowledge Base can provide additional troubleshooting info.

CM Status: Good

Downstream Status: Good

    Downstream Power Level: Good

    Downstream SNR Level: Good

Upstream Status: Good

    Upstream Power Level: Good

Current Time: Wed Aug 28 07:48:35 2024

Startup Procedure
Acquire Downstream Channel: 519000000 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     20     519000000 Hz     1.1     44     0     0
      2     Locked     QAM256     13     477000000 Hz     1.9     44.4     0     0
      3     Locked     QAM256     14     483000000 Hz     1.8     44.4     0     0
      4     Locked     QAM256     15     489000000 Hz     1.8     44.3     0     0
      5     Locked     QAM256     16     495000000 Hz     1.7     44.2     0     0
      6     Locked     QAM256     17     501000000 Hz     1.5     44.2     0     0
      7     Locked     QAM256     18     507000000 Hz     1.4     44.1     0     0
      8     Locked     QAM256     19     513000000 Hz     1.2     44     0     0
      9     Locked     QAM256     21     525000000 Hz     1     43.9     0     0
     10     Locked     QAM256     22     531000000 Hz     0.8     43.8     0     0
     11     Locked     QAM256     23     537000000 Hz     0.6     43.7     0     0
     12     Locked     QAM256     24     543000000 Hz     0.5     43.5     0     0
     13     Locked     QAM256     25     549000000 Hz     0.4     43.4     0     0
     14     Locked     QAM256     26     555000000 Hz     0.4     43.4     0     0
     15     Locked     QAM256     27     561000000 Hz     0.4     43.4     0     0
     16     Locked     QAM256     28     567000000 Hz     0.4     43.4     0     0
     17     Locked     QAM256     29     573000000 Hz     0.4     43.4     0     0
     18     Locked     QAM256     30     579000000 Hz     0.4     43.4     0     0
     19     Locked     QAM256     31     585000000 Hz     0.3     43.4     0     0
     20     Locked     QAM256     32     591000000 Hz     0.3     43.4     0     0
     21     Locked     QAM256     33     597000000 Hz     0.3     43.4     0     0
     22     Locked     QAM256     34     603000000 Hz     0.2     43.3     0     0
     23     Locked     QAM256     35     609000000 Hz     0.2     43.3     0     0
     24     Locked     QAM256     36     615000000 Hz     0.1     43.3     0     0
     25     Locked     QAM256     37     621000000 Hz     0     43.2     0     0
     26     Locked     QAM256     38     627000000 Hz     0     43.2     0     0
     27     Locked     QAM256     39     633000000 Hz     -0.2     43.2     0     0
     28     Locked     QAM256     40     639000000 Hz     -0.3     43.1     0     0
     29     Locked     QAM256     41     645000000 Hz     -0.5     42.9     0     0
     30     Locked     QAM256     42     651000000 Hz     -0.6     42.8     0     0
     31     Locked     QAM256     43     657000000 Hz     -0.8     42.8     0     0
     32     Locked     QAM256     44     663000000 Hz     -0.8     42.6     0     0

Upstream Bonded Channels
Channel   LockedStatus  ChannelType ChannelID   SymbolRate        Frequency       Power     
      1       Locked       ATDMA     18       5120 Ksym/sec       22800000 Hz       44.0 dBmV
      2       Locked       ATDMA     17       5120 Ksym/sec       16400000 Hz       43.5 dBmV
      3       Locked       ATDMA     19       5120 Ksym/sec       29200000 Hz       44.3 dBmV
      4       Locked       ATDMA     20       5120 Ksym/sec       35600000 Hz       44.8 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     193     722000000 Hz     -0.92 dBmV     41.5 dB     628 ~ 3467     803995236     796678693     0
      2     Locked     0 ,1 ,2 ,3     194     957000000 Hz     -6.42 dBmV     37.8 dB     148 ~ 3947     835977497     812654197     147

Upstream OFDMA Channels
Channel   LockedStatus    ProfileID    ChannelID    Frequency       Power
      1     Locked     12 ,13     43     36200000 Hz     40.5 dBmV
      2     Not Locked     0      0     0 Hz     0 dBmV