I feel like Im settling for less than I deserve?

[A]

My fiancé and I had a great relationship for 3 years, then he had life changing weight loss surgery. Afterwards, he changed...for the worse. I am very happy he is now healthy, but his attitude sucks. He constantly brags about himself and how many people like him, talk about him, admire him, want him, etc...but then he tells everyone he is humble when he is far from it. He always brags about getting hit on and how he could have better women. Afterwards he also blocked me on all social media and then started adding females, started "liking" slutty pictures on fb, started making "friends" with strange women online. When Ive explained how I feel about being blocked and him constantly throwing these online women and real life local women in my face, he makes excuses and refuses to stop. He ignores me a lot, he has a lot of down time at work and I can see he is online, but he wont reply to anything I text. When he asks me questions he only wants a yes or no answer-if I try to explain anything he gets angry. he is always pointing out my flaws, but if I tell him he is ever out of line, he gets very angry at me and is in complete denial. Its like everything has went to his head and he craves attention from everyone else. He doesn't even have "in a relationship" or anything online. Maybe these seem petty but im tired of being treated like garbage and its like im only around when its convenient for him. he treats everyone, even strangers better than he does me. If I get upset and cry about the things he says or does, he tells me to knock it off. I give him tons of attention, take care of the house, I work, and I go to school, all he has to do is work. the last 2 years have been miserable. I love him, but I feel he doesn't treat me right. I expect respect and its like he has no regard for how I feel when he is throwing all his new women friends in my face. He says its no big deal. it is when he blocks me and doesn't even acknowledge our relationship online. although I have never caught him chatting inappropriately, I still feel his actions are inappropriate by liking and friending slutty women. Do you think im settling for less or is there a chance im just overreacting when dealing with his change? Im at the point im ready to leave, unless someone can help me understand why this is okay an maybe im overreacting...please help...to be honest, im also afraid if I leave that he will very quickly move on just to hurt me and yes it will hurt because I love him...I just wanted him to love me and respect me like he used to
Dodge, I neglected to mention that I've suggested counseling MANY times only to be lashed out at, he refuses, and gets extremely angry, he denies having any problems. He sees no wrong in any of it, all the blame is placed on me. I'm not a quitter by any means, I've tried for 2 years after surgery only to be treated like garbage while I worshipped the ground he walks on. I can't do it anymore.