I'll defend Brie Larson's acting abilities to the ends of the Earth, but I won't defend her performance in Captain Marvel.
I don't know what combination of actor or director decisions got that performance, but it was just so consistently flat. I think I liked her better in The Marvels, but I haven't seen it in a while and can't give any specifics. I also haven't read a Carol Danvers comic since she gave birth to her son's father, so I don't really have any good takes on what the "right" personality would be.