Leaving a good marriage?

Have any of you left a marriage because of your mother In law/in laws? My husband and I have a good marriage but unfortunately my mother in law is way too involved. She has said and done very hurtful things to me (which I can’t even get into right now) and my husband has never ever come to my defense and just makes excuses for his mom. As much as i love my husband, I can’t deal with his mother anymore and she is a huge part of our lives. The only way to get away from her is to leave him. Anyone else ever been in this situation?