Please do not fall in the pitfall of thinking that you need accept every behaviour to be a good buddhist and get rid of suffering… You will end up clinging to a relationship and sanctioning yourself all the time and that is not the aim of buddhism at all.
Letting go is something that should happen within the space of your mind – it does not mean your partner can do everything he wants and you need to accept it! Lettin go can also mean to walk away from something without anger.

Please don’t marry someone who thinks you are not an ideal match (FAR from the ideal match) and who hasn’t got your back! Why would he talk about you in such a way?? There are too many good men out there who will love you just the way you are, and who will cherish and accept your weaknesses and STILL think you are the perfect match!!
You are good for him? You need to be loved, not USED as a bandaid!

Buddhism is a path that can be very healing, that can help to lighten suffering. But we are human beings, and we need love, even if it sometimes means struggling.

My only maybe buddhist but very personal advice:
Free yourself from wanting to be the perfect bride for him.
Forgive him for using you as a bandaid.
Walk away in peace.