I hear about companies telling candidates they "can't code" or "can't communicate" a lot. This just seems like a really rude and arrogant thing to tell someone.

I hear about companies telling candidates they "can't code" or "can't communicate" a lot. This just seems like a really rude and arrogant thing to tell someone. If you want to give a candidate feedback, give specific feedback and give it politely. The people who want to improve will get the picture. If you don't want to, just thank them for their time and interest. Other than that, I think you're right. Some of this was really pretty normal and not worth being upset about.