Highly latency and dropped internet connections.

M internet connection keeps dropping and high latency is persistent despite working with Xfinity over the last year. New cable installation (the installer told me it's too long of a run for the cable), new gateway, and still these issues persist. I own an MSP and have years of experience in IT and cybersecurity. I use dual internet connections for resilience, Verizon and Starlink, before cutting down costs to Xfinity. With Xfinity speeds I'm paying for my kids and I cannot game because of these issues. I have a UDM Pro and run speed tests every single morning. I have documented the continued dropped connections and high latency. My UDM Pro alerts when they happen. What do I need to do to be able to game with the Xfinity connection? As bad as it is, I'm paying for a higher internet speed that I never get. At this point, researching and finding many with this same complaint, I feel extremely upset and I'm willing to go farther than any other customer if I do not get help. I don't care how big Xfinity is, I will advocate in whatever manner I can, no matter the cost. Xfinity is gas lighting telling me that it may be my UDM Pro when I know it's not the case because it doesn't happen with other ISPs.