Resentment towards husband

I’ve had a bad relationship with my MIL since we got engaged and it’s gotten progressively worse within the past 4 years. A lot has happened and the relationship is tense. I do everything I can to mend the relationship and make her happy in hopes that she likes me (I’m embarrassed to say that honestly). But it’s clear she will always view me as an adversary and a road block between her, her son and her granddaughter. I hate that I’m stuck in this relationship and I think about waaay too often. I’m starting to resent my husband even though he’s done nothing wrong but I literally can’t help it. I hate the conflict with his mom and I feel trapped. I guess I’m just wondering if anyone else has experienced this and if so, what have you done that helped decrease the resentment?