Well I believe in 'don't fix it if it aint broke'... It aint broke, he is how he is, he won't change. According to him, your relationship aint broke either, its working EXACTLY as HE wishes. Don't get me wrong, I too stayed with a monster bcoz of 'investments' and sheer stubborness, so trust me, I'm not judging. Just wish you understood that life and love have SO MUCH BETTER to offer you than the BS you choose.
Please don't feel bad, but I will refrain from responding further to such posts, as I find it triggering when people seek guidance/advice regarding abusive partners whom they CHOOSE to stay with.
Go well and take care