That was my initial instinct, to be judgemental. Then I asked myself, how does this impact me? It doesn’t. But if I was rude to them, as you are being, that would impact them. It would not make them give up their identity, it would just add negativity to their day. So let them be who they want to be, it doesn’t impact us in any way to let them exist as they choose.
A strategy that has worked for me: very quickly browsing all new, just looking at community names. I barely look at the posts, just make a quick decision if it sounds interesting to me. I’ll check the sidebar and decide from there to subscribe or not. I’ve found dozens to follow and a bunch to block lol. It’s cleaning up my feed pretty nicely and my home page has a lot of content now.