It's because there are a whole bunch of entitled fans acting out and making sure their entitled comments are known to her? It's not hard to believe that she's been bombarded with a lot hate comments that are legitimately mad at her for dating.
You're right. She shouldn't be crying because fans need to step out of their entitled mindsets. She had to actually apologize to fans, but people want to nitpick and make her a drama queen instead of seeing that it's caused from entitled fan reactions.