I think public people (celebrities and stars) must teach themselves not to react on negative replies at all. It can be difficult because we all are people, alive people, but she made her choice when she came on the TV-show, and now milions know her and not anyone loves her. It's a fact and she mustn;t fight with it at all. Somebody loves her, other don't love - it ok.
In Russia we say "I'm not money to be liked by anyone"-)
We have many Insta stars in Russia too, and I often see many quarrels in comments when celebrities start to reply on negative comments and protect themselves. It's stupid waste of time and nerves I think.
Many men - many minds, let people think what they like to think)
Only we know who we are and what we are-)
(P.S. I'm not an Insta user, I just see it in news sometimes-)