Slow download speeds

I have the Connect More "300Mbps" rated speed and my own Motorola MB7621 modem. Modem was purchased new a little over four years ago. My PC is connected via ethernet cable. I am getting about 93 Mbps downloads, 23 Mbps uploads and 18 ms latency. I called, talked to a robot, and was sent a link and was texted immediately that a technician need to come out. One is scheduled to come tomorrow, but if someone can determine that it's most likely my modem, I'd rather cancel and just purchase.

Lately my internet has been going out and restarting the modem has fixed it. Last night it went out again and was still out this morning. Turning off, waiting 30 seconds, and turning back on didn't fix it this time. So I tried unplugging power cord and also coax cable, plugging both in and that worked. 

Only started attempting speed tests the past few weeks and always under 100 Mbps.

Time Not Established    Critical (3)          SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;  

 Time Not Established  Critical (3)          No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;

 Time Not Established  Critical (3)          Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:a*:*;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.0;CM-VER=3.0;