I agree with you. But I think those are the words used by the haters. The artist may have done their homework. The onboarding procedure, the concept of instances, etc., is different or cumbersome, or difficult, whatever. So, if you have trouble figuring it out and you go looking for help you sometimes find these threads or posts/videos saying:

“It is SOOO easy. Just choose an instance. It’s like [insert analogy here], get it? Good! Now have fun and be kind and polite 😸”^[1]

And some would use the strongest word possible to describe the situation: condescending.

Personally, I didn’t find that part condescending. And being told to add alt-text isn’t a problem. And using CW for lots of different things isn’t a problem either. I have had one confusing interaction on Mastodon where someone blocked me after accusing me of some offense — a “lost in translation” situation where a non-native speaker misinterpreted what I was saying and before I could explain to them what I was saying, I was blocked… but that can happen on any social network.