I think its more about Alicent telling herself and everyone else that they should care. What she says is one thing, but she is leading and tacking actions that points to something else. She is playing the game like everyone else.
Aegon is not on the level of Joffrey, atleast we havent seen everything that would point towards it. Last episode did tell us that he aint all good though. And of course he liked the attention he got. That attention might just give him the boost to become worse than he already is.
Probably the only good guy here was the poor old king. He wasnt maybe the most tactical, but his heart was good. He wanted peace, for everyone. The others? Nah. Carnage.