I really wish people would stop whining in the comment sections every time they see an article about Elon Musk and take some initiative to solve their own problems. Open uBlock Origin and add a damn filter. Adjust to your home instance:
div.post-listing is the element to block
:has(args) returns elements where args evaluate to true
span is the element with the title text
:has-text(needle) returns the element if it has the next needle, supports regex with \needle\ and remove case sensitivity with i
Edit: lol of course this was instantly downvoted. Because these kinds of people don't actually want Elon Musk out of their feeds, they just want to complain.
This is good practice for you to just ignore the things you don't like. There is no such thing as safe spaces and you kids need to grow a thicker skin to survive.