I have to totally agree with rockrose. When with someone that is a parent, it is our job to see their child as their primary responsibility and obligation over and above us. He loves his child. I would never be with someone who didn't care for my child or called the names.
I do think it is easier to date someone without children and that may be the most peaceful route for you to take here. good luck
Break up with your boyfriend if you can't stand his child?
That's my guess.