I've noticed YouTube comments have actually become more positive (though still mostly useless). It seems YouTube has implemented some algorithm where it prioritizes "positive" sentiment comments above all. That's why all the top comments on popular videos are generic platitudes.
For example, go on any MrBeast video and read the top comments. They are all praising MrBeast for his videos and hard work. Finding any negative comment is difficult. On the other hand, if you go on a Reddit discussion about MrBeast, you'll find plenty of people complaining about him.
MrBeast is just an example, I'm sure we all have our own opinions about him but that's not the point I'm trying to make. In fact, the same is true for any popular YouTube channel. Even political channels, where you'd expect to see heated debates in the comments, mostly showcase top comments agreeing with the video.
That's the thing, I personally liked the YouTube homepage! Even with watch history disabled, I found it gave me decent mix of recommendations based on my region, subscriptions and Liked videos. I know many people dislike the YouTube algorithm but it actually worked well for me.
Now that YouTube has disabled my homepage (held hostage unless I turn on Watch History), I am far less inclined to go on YouTube and watch random videos. Which is probably a good thing for me, let's be honest. On the other hand I don't know what YouTube wanted to achieve with this move. I find it hilarious that my homepage is empty now by Google's own choice.