Would you mind sharing screenshots (or at the very least name specific examples)?

What you're describing is technologically and financially infeasible for Google to do at scale (or even to one specific person). If Google were able to track you that well, they wouldn't modify the recommendations for you, they would quietly add it to an ad profile on you. The only reason the YouTube algorithm exists is to keep people on the platform for longer, when you use invidious, you are losing YouTube money, so they have no financial incentive to modify their algorithm for you.

If you're using a small few person instance, then what you watch can actually influence the recommendations (at least until the token rotates), but that isn't Google tracking you specifically. If you use a more popular instance (like nerdvpn or nadeko) what you watch will do little to influence the front page algorithm.

As I mentioned in my previous comment, I'd suggest you look into how the various privsec technologies you're using actually work, and also look at how companies are actually able to track you. If you just assume a company can do something because they're big, powerful, and scary, suddenly the company seems much bigger, more powerful, and scary than they really are. It's also important to remember that just because something can be used to correlate activity with the user doing, that doesn't mean it's something that can be done at scale.

Judging from your previous posts and comments, it sounds like you're quite new to privacy. This kind of mentality (in one form or another) is very common amongst people who are new to caring about their privacy. Surveillance has been happening for your entire life, so it's not going to hurt to take a bit to think about things with a clearer head. Of course, if you're in a situation where lack of privacy might cause physical harm, find help ASAP, but generally you can take things at a slower pace to help on the long run. That's not to say stop caring at all, but you don't need to suddenly drop everything and move to a bunker in the woods. Too much change at once can lead to privacy fatigue, which only makes it less likely that you'll escape any of the surveillance of the modern world.