I'm sorry you've had this experience, should you need people for a raid I'd be more than happy to accompany you through some. Although you didn't join an "experienced" team if they're struggling to consistently kill the knights tbh. You're right that PvE doesn't take too much skill to be good at, even flawless raider I can single handedly carry people through without much difficulty. It's the people that go soloing hard Oryx etc that are really impressive :P