I was in an abusive marriage years ago, and we spent 2 1/2 years in counseling. It did not help, if anything, it made the fighting worse. An abusive person will not generally come out and admit they are abusive. Instead, they make excuses for their actions and find a way to blame their spouse for it, to justify their actions. Certain things were "taboo" subjects and would set my husband off in a rage if I talked about them. He felt certain things should be kept private. What's the point of going to counseling if you can't talk about everything that needs to be talked about?
If you're in an abusive relationship, the best thing to do is just get out. Don't be like my former neighbor, who finally shot his wife and killed her, as their 8-year old son jumped in the way to try and safe her life, causing the bullet to go through him into his mother and killing them both. Why take a chance that things could end up that way?