but they were exceedingly rude. I mean really, who doesn’t move out of the way to let someone access the window seat? I thought everyone did that? Isn’t that just common courtesy?

Why is that anybody's problem but yours? Demanding other people's seats (by the way, your problem is not their problem, or their fault) is 'exceedingly rude'.

Both OP and a lot of the comments reek of an entitlement complex. Yeah, it was bad treatment by the airline staff but it's possible those other people paid to reserve their seats - why should they give them up for something that isn't anything to do with them? It wasn't their error. Seriously - grow the fuck up.