Intermittent Severe Packet Loss for weeks

Hello,

I started having issues with gaming/streaming on or before 24-Jan-2024.  The issue has been intermittent with no apparent pattern.  I would characterize the problem as intermittent severe packet loss.  Here are the steps I have taken to troubleshoot the issue so far:

1. Confirmed the packet loss occurs on both LAN and WiFi
   1. running ping google.com -t in windows on 2 separate devices (1 Desktop connected to LAN and 1 laptop on WiFi).
   2. Packet loss observed on both devices.
2. Eliminated all devices from my home network (except desktop on LAN) --> did not address issue
   1. Disabled WiFi to disconnect all other devices on my network
   2. With only desktop connected on LAN the issue still occurs
3. Checked cable routing inside home --> did not address issue
   1. removed unnecessary splitters to improve modem power levels
   2. verified power levels are within the expected range
   3. changed coax cables where possible (between modem and wall)
4. Restart of XFi gateway, factory reset of XFi gateway --> did not address issue
5. Replaced modem/router combo (Comcast owned XFi Gateway) with Arris SBG8300 including ethernet and coaxial cables--> did not address issue
6. Comcast technician visit on 31-Jan-2024 --> did not address issue
   1. Technician inspected cables inside the home and connections outside the home
   2. He stated he replaced some connections on the exterior of the home

Here is an example of the packet loss experienced when pinging google.com Note the severity and duration of the packet loss varies but reaches 100% at times.

Another example of the packet loss experienced in the last 24 hours:

I have been on the phone/xfinity chat almost daily (with exception of the 5 days I would out of town) with Comcast trying to get their support to address this issue.  I have an additional appointment schedule 11-Feb-2024 which Comcast has already called to try and cancel TWICE because "everything is testing out fine from their end".  I have reassured them everything is indeed not fine and I am still experiencing the intermittent packet loss.  I am not sure what is left for me or Comcast to test here in my home.  

I am unable to use my internet for basic gaming. I am experiencing issues on voice calls with work when working from home.  I am not able to stream for over 2 weeks now.  

What assistance can be offered to narrow this issue down?