They really should stop showing videos from your subscribed channels in the 'Home' view. They take ay too much priority there.

If you're finding that YT, when logged in, is becoming obsessed with any one topic, you can go into your YT history and remove some of the entries related to that topic.

That'll remove those from consideration and your home screen recommendations will change.

It has gotten to the point that I have trouble discovering new interesting things -- unless I already know what I'm looking for I probably won't find anything to watch that I haven't already seen.