Because you say things like all women are sluts or whores.
Your attitude comes off in your interactions with others and women have a 6th sense for this kind of thing.
Maybe if you just got to know some women you admire as friends, without any ulterior motive, then you could discover they are people trying to live life as best they can. Just like you.
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh