I wanted to just upvote this and move on, but I feel like that would be a disservice to you because I feel the same way about commenting.
I would say to just ignore the negative comments and continue to post. good people should not tear each other down like you describe. you never truly know who is replying to you, it could be a kid or someone that has some issues that need to be addressed.
I understand its much easier said than done, but training yourself to have thicker skin is like a muscle, just gotta keep going out there and train it lol. good luck!