So when Lindsey got asked why she is so angry with Clarke and Bellamy this season, I loved Lindsey's answer a lot.

She's basically saying what we've been discussing in the episode thread for 4x03.
That Raven hasn't had to make big decisions so far while Bellamy and Clarke had to do it all this time. And so it was easy for Raven to yell at Clarke that she was terrible at being a leader. But now, when faced with the consequences of tough decisions, she gets that it's a lot harder than she had thought.