Have you ever been through this with an ex?

My ex and I were together for a year, but towards the last few months I moved out of state due to my mothers health concerns. He wanted to stay together. So we were in a long distance relationship for a while but in the end he wasn't able to stay happy & I ended it. We had our closure & didn't talk for a while. Then out of the blue he started texting me calling me a c*nt, a fat b**ch & a psycho, saying that he can't believe he ever loved me, he's happy we broke up because he can do way better & that he's glad he didn't have sex with me because I'm a fat psycho b**ch & apparently I was "controlling" him by telling him not to be friends with people who didn't treat him well & encouraging him not to drink or do drugs (which he's now back into). He said lots of other cruel things & I was just sitting here wondering what the heck I did? I thought we had a good relationship while it lasted & it was a pretty happy one. What did I do to deserve this? I've never had a man call me a c**t before so I was pretty shocked. I've had lots of people tell me that this is his form of retaliation because he's still butthurt by the fact that I broke up with him & he doesn't mean any of those things (especially since he was "in love" with me just a month prior), but is only saying them because he feels the need to "hurt me back" since he knows I'm happy & have moved on & it kills him to see me successful. I have no idea what to believe though.. Have any of you ever had something like this happen?