I'm also on a mission to clean the "For You" feed. I tried using local LLMs to do this real-time classification, but it's currently just too slow.
Another way to reduce the spam, is to remove bot followers from your account, I believe these bots use "likes" (which are hidden) to boost content for the botnet owners. Most of these bots are easy to spot, 0 posts, and very bad follower/following ratios. I built this Chrome Extension for bot removal automation: https://chromewebstore.google.com/detail/x-bot-remover/aohkh...
It would be way better if this was just done by X themselves, but why not try.