Sorry your For You page sucks, but that's a you problem. My For You page is excellent - I see mostly the kind of tweets I like, and when I see a tweet I don't like I tap the not interested button. I actually love the new FYP way more than the old home feed, and the option to switch to the chronological "Followed" feed is more visible than before.
This is complete bullshit. I have the exact same experience Parent has, my feed used to be full of interesting people from tech, science, and journalism. Now it's ~80% meme feeds sprinkled with a small helping of what I actually care about. How is that my fault, as a user that had a perfectly good curated feed prior to For You existing?
The only reason my FYP is good is because I blocked all the different meme accounts they added. A good algorithmic feed for a power user is one that 1. shows people you follow but 2. in relevance order not chronological order.
The current one is half trying to be the new Reddit account experience and half trying to show you politics news you'll get mad about for engagement.