Jim Carrey's dislike of the part he played in 'Kick Ass 2' is all down to circumstance. Like the original movie, this sequel is a blend of ultra-violence and dark humor, and Carrey was reported to have had a blast while making it. After it was made, though, he was reluctant to take part in promoting the film. Something terrible had happened in the real world, and it made Carrey think about the responsibility he has as an entertainer.
Just as filming on the movie was coming to an end, the tragic mass shooting at Sandy Hook occurred, and Carrey stopped to think about the effect that violence in films may have on the people who watch them. He tweeted his reasoning for withdrawing his support from the film, stating that the level of violence it displayed wasn't appropriate given what had happened. He hasn't appeared in a violent role ever since.