Frequent Intermittent Disconnections and slow internet

This may or may not be the root cause of the problem (YMMV) but it should be addressed regardless.

The downstream power is too high. It may be over-driving the front-end receiver circuit of the modem. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

Is there a drop amplifier on the coax cable line leading to the modem ? If so, try removing / bypassing it and see. If not, you can try installing two -6 dB Forward Path only attenuator pads such as these back to back on the coax port of the modem to knock that power level down and see;

https://www.amazon.com/FPA6-54-Forward-Attenuator-DOCSIS-Internet/dp/B08KTRC3XZ 

It won't affect the upstream power level which is within spec. Good luck !

@user_dbdead Hello! Thank you for reaching out to us here on our Community Forums. We can definitely take a look at your connection issues and thank you for sending over the data log. We'll need you to send us a Private Message with your full name and service address to take a look at your connection. Here are some steps on how to send a PM in case you need them:

Click "Sign In" if necessary
 • Click the "Peer to peer chat" icon (upper right corner of this page)
 • Click the "New message" (pencil and paper) icon
 • Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
 • Type your message in the text area near the bottom of the window
 • Press Enter to send your message

We look forward to hearing from you, and we'll be happy to investigate this further.

@user_dbdead 

Have you had a chance to try any of the suggestions yet ?