Need a Line / Maintenance Technician

My line was replaced in January so it should be pristine. I've capped/terminated all unused coaxial outlets in my apartment besides the one that I use for my tv box and my XB8. I restarted my XB8 today and the logs were filled with 200 uncorrectable codewords on downstream 20 and 194 instantly upon reset. There were over 6 million uncorrectable codewords prior to the reset and they had accumulated over the last 3 days. I have constant RTT Jitter in Valorant and my bullets fail to register about 70% of the time and I lose packets in every game. This is on an ethernet connection with a tested cat8a, cat5e and cat6a currently in use. It is not my PC or any driver or adapater. I've tried every possible software related fix on my end and it's become apparent that it needs to be fixed on your end. This problem has plagued me for about 3 years now. I also used to prioritize my PC on my gateway but apparently that option was stripped from me and put in a higher payment plan without my knowledge while also simulatenously disallowing me to use google dns since you highjack my DNS and reroute my traffic which is causing even more lag in game. I'm starting to see why people look at me like I'm crazy for defending Xfinity all these years.