I hate my mother in law and I don’t know what to do

I know hate is a strong word. Maybe I don’t hate her but I feel like it’s pretty close. She once said her mother in laws ashes should be thrown in a dumpster. She knows everything. She’s always right even when she’s wrong. She thinks because she raised 3 kids, badly might I add, she knows everything there is to know about motherhood and more. Unfortunately her kids are just like her. They possess the very same bad qualities that she does. She’s selfish, self indulgent, self centered, arrogant, stubborn, self-important, self-righteous, etc. I could go on for days. I’m at a loss. I’ve been to therapy a few times because of issues I’ve had with her. We’ve never had any type of confrontation or argument but certain things she says and does really make my blood boil. If some day I have children with my husband I truly and honestly want her to be involved as little as possible if not at all. I don’t think she’s a bad person, she’s just not someone I want too present in my life. I try to spend as little time as possible around her. She makes me anxious and frustrated. How do you guys cope with your mother in laws? What’s helped? What can I do?