While this guy sounds like a total arse for whatever reason I am a guy in a relationship with a significant age gap emotionally supportive of my partner who is amazing in every way but suffers with mental health issues while lots of couples with heavy age gaps tend to have an element of emotional manipulation I can tell you that shit wouldn't fly with my better half she would pick up something heavy and smack me with it. Which is exactly the correct course of action.

So please don't tar everyone with the same brush.

Op your guys is acting like a twat you are saying this makes me feel shit please don't do it and his actions are screaming fuck you in your face maybe he is emotionally stunted and can't deal with your issues but the net result is it's just affecting you negatively look after your self first. Hope you get it sorted and quickly