In law problems

So for 11 years I've dealt with drama from my in-laws. I've fought with them, I've tried being the bigger person, tried sitting down with them to change things but they refuse to try to move forward. Me and my husband have a 2 yr old. I was so worried during my pregnancy that they would make life harder and my husband thought the exact opposite. Well I was right. Especially with his mother. She will make digs at me, talk shit about me behind my back and makes little passive aggressive comments. My husband has spoken to them many times but they are not going to change. Holidays are stressful and they make sure to be hurtful. His mother has to be center of attention with anything regarding my son. My birthday passed a few days ago and neither of them acknowledged it. So I have to make a decision for my mental health and happiness and so I decided that moving forward I'm no longer including myself in anything that has to do with them. Holidays, get together, etc unless it's something important with my son or a big deal. I'm not sure if this is the right decision but it's the only one I can see being affective.. I just wanted to vent and maybe see what others think.