Black women with bad attitudes

This is kind of a constant in Tyler's movies but with this one, it really made me mad that these sisters were jerks to each other, their mom and their husbands. I know we finally find out what Kimberly's problem was but I don't remember the movie ever explaining why Tammy was a jerk to her husband. Was it because he was being a push over? I don't know. I'm just sick of this stereotype in his movies and shows. That's why I refuse to watch anything from him that has that actress who portrays Angela. She is the worse of that stereotype.