My Tubi app via the Xfinity X1 cable box is horrendously slow. Why?

The Xfinity streaming app for Tubi is so egregiously slow that it’s almost unusable. A single remote command on the app can take upwards of 20+ seconds, which is beyond ridiculous. I restarted my cable box and cleared my user data via the Xfinity settings to no avail.

I have used Tubi at four different family members’ homes in Florida, North Carolina, and Maine and their remote commands respond instantaneously while using the app. The common denominator between them is that they’re not Comcast/Xfinity subscribers, which leads one to a simple conclusion: Xfinity third party streaming is being throttled intentionally, thusly, I am currently looking for a new ISP unless there is an immediate fix. DO NOT tell me to check for loose connections or power strip usage. This is not a leaky faucet or a clogged toilet.