I only use YouTube with my watch history set to off. So there is no feed, and I only see updates from channels I actually subscribed to. If I want to see some random crap I go search for it but it’s a clean slate next time I open the app. I have found this method of using YouTube to be extremely useful.

Turn off history. Completely disables the food. The only content you see is what you search for.

Do not give them the satisfaction. Dont like videos and never comment on anything. The videos are the bait. The comments sections are the trap. Use youtube as a multi-channel TV. Keep it a one-way stream of data. Give them nothing beyond the unavoidable knowledge of what you watch.