I will not talk about the ethics and privacy issues of Twitter but about user experience and quality of content on feed.
The quality of content on your feed is as good as the people you choose to follow. Choose selectively, block and mute liberally. Keep doing this, and your feed will be fantastic.
I use Twitter only for work. I set my Trending country to some country I have never heard the name of outside of trivia books containing nation capitals.
And my Twitter experience is fantastic. Have meaningful discussions, learn new things, gain new perspectives.
I keep away from politics and such.