It actually bothers me a little how some people want Korra to be exactly like Aang. They’re different Avatars, in different times, from entirely different upbringings. Yeah, Korra can be irrational with her thoughts, but she’s been very sheltered her whole life and I don’t think anyone really told her about how the world and politics work. She didn’t even seem to have friends until she met Bolin and Mako. Compare that to Aang, who was allowed to roam around and see the world. Before Sokka and Katara, he had Kuzon, Bumi, and all those other airbender children to play with.
I’m not trying to justify Korra’s actions, blowing up at the president and straight up sending Mako’s desk flying are definitely not the best ways to deal with the civil war. I’m just trying to explain that even though she is Aang reincarnated, her new life is vastly different than her old one, so she will act based upon what she has learned from her family and teachers.