My solution is aggressively unfollowing or disconnecting from people. There may still be a lot of low value interactions, but at least I don't have to see them.
LinkedIn has been showing algorithmic feed from 1st, 2nd, & 3rd degree connections for a while, but they recently started aggressively showing out of network content for engagement. So unfollowing might help to filter out speicific people, but it won't stop your feed from getting cluttered with unrelated posts from some random person.
