I don't know. I don't think Larsen did badly, though I think the script did her no favors. The script constantly put her character in a position to be displaying a confused or passive emotion, which has lead alot of people to criticize Larson's acting. She also gave Carol more of a dry wit than the demonstrative humor of a Spider-Man or Stark or Deadpool. Which is fine, but Marvel's males characters have typically been 'bigger' in how they do humor.
I'm not sure what actress I would have chosen. I would have wanted a woman who could play comedy for sure, as well as generally the ability to act. But like I said, I think the weakness of CM was the script, not the actress.