What did I do to deserve this

Recent college graduate and now work as a software engineer.

I met someone online who I thought would be my wife. I thought she accepted me for who I was. Later on she started hating many things about me, my politics (I am a socialist and feminist), my looks.Called me a conspiracy theorist for citing American intervention in Latin America, would get angry at me for saying sorry to her if she got mad at me, made me afraid to talk about politics. All I wanted is for the world to be better and she didn't like that, said I needed to be selfish and only care about her.

It was my longest relationship. After a year of no contact, I broke down and asked her to come back, and she rejected me.

It's really hard for me to date, I rarely find anyone that is similar to me. I still think of her everyday and it's so depressing.

What did I do to deserve this?

I sacrificed my mental sanity and a Social life for a rigorous education, and now my mental sanity is worse with this break up