Unfollow, unfollow, unfollow. And don't click/like/respond to aggravating posts!! I get a lot of value from reading my X feed.
A simple way to improve your mood is to curate your feed.
Evidence: People were randomly assigned to unfollow accounts that spewed hostility, hyperpartisan views, and low-quality information.
6 months later, they had significantly higher well-being and lower outgroup animosity.