“angry characters need to learn control” no, actually. let them be angry. let them lose their cool. let them take it out on the things around them. let that anger build inside of them until it has no choice but to be let loose or it’ll destroy them from the inside out. let them have such a visceral and intense outburst that it irrovocably changes the world in a way that can never be fixed. let them leave that mark on the world from nothing but their own rage. let them scar the world and let them feel it. let them be emotional. let them be raw. let them feel it and express it in the only way they know how. let them grow as a character, yes. let them thrive and develop and change. but for the love of god, let them be fucking angry.
"everybody hates me" factoid actually just a statistical error. The average person doesn't hate you, especially not your friends. You, a person who sits in your room experiencing self loathing every day, are an outlier adn should not have been counted.