I've been having some success by configuring my RSS reader with simple rules, like "please don't tell me about shorts" and "I don't care if this person is live right now." Too bad the real homepage shows three enormous thumbnails and pretty much exclusively the things I want to not see.

For the home page, I would recommend the "UnTrap for Youtube" browser extension.

How do you filter out live streams? They look exactly the same to me in the rss feed.

I got lucky: the only creator doing that used a consistent name for the video, so I could pattern match on that. I haven't found anything that would work universally.