You're definitely NOT stupid, OP. Neither are the millions of women who get trapped into horribly toxic relationships with men that drain them of their life force. Look at Tina Turner, Mariah Carey, Cassie Ventura, FKA twigs...
In fact, I read recently that women who are very competent and driven, objectively extremely successful in their careers, type A people - they may be MORE likely to stay trapped in relationships with toxic abusive men because they're used to solving difficult problems and think the same strategies will solve their marital problems.
But that's not how these things work: you can't change a toxic man into a non-toxic man because only HE can do that. And even if he tries to change because otherwise she will leave, the changes will only be skin deep, performative, and they will disappear the second he thinks he's got her under control again.
You're not stupid, OP. You're just stuck.
You're on the right track, though. You identified that you are trauma-bonded, and you are. Addressing THAT will set you free.
Stop the couples counselling immediately. The hard rule is NOT to go to couples counselling with an abuser because they will just weaponise what they learn in those sessions to flimflam, confuse, and trap you further. It's called therapy abuse. Major domestic-violence and ethics bodies state that when abuse is present, couples counseling is not appropriate and may be actively dangerous to the victim.
Individual counselling would help you get past the trauma bond.