Packet loss to Valve's servers

This is an ongoing issue for more than a year now. Xfinity support keeps telling that everything works perfectly fine. 
I had to buy a new modem, ethernet cables. I even had to take my PC to my friend’s place to test and make sure everything on my end works perfectly fine.

I have spent so much time to fix this issue and can possibly qualify as a network engineer myself.

I have done a pingplotter test to Valve’s server and found that there are packeloss on Comcast’s servers on hops beyond Hop 4. On my the most recent test. It showed 34.9% loss on hops beyond Hop 8 (

be-31123-cs22.beaumeade.va.ibone.comcast.net). Unfortunately, even after telling that the support keeps sending a tech to my home address instead of fixing their servers

UPD. after TWO tech visits, that included replacing all the cables from their poles to my home, double checking the "noise" on my line and proving that everything is fine on my end. Refusing to escalate ticket to Network Operations Center. I was able to get a rep over the chat to do escalation at NOC with ticket number ECM0022637189, with a committed call back. However, I only received an automated text back stating that the ticket was closed without an approval, without investigation, and without any contact or explanation. Nothing is being fixed. Reps on the phone/chat try to upsell unnecessary things before even looking into the issue. It is almost like asking a help from a "gypsy". 0/10 service