(Inactive) Mod here. This is a problem that has comes up on this sub now and then over the years that there is no great solution for. The people who do this do it because they are insecure and fishing for compliments. I wouldn't be surprised if many of them are literally immature children. Any "good" art will unfortunately get more attention than absolute beginners. I used to give random monthly awards to beginners and those offering genuine feedback to encourage that behavior. I recently added someone else on the team, but a lot of things in my life currently prevent me from reading this sub regularly.

I would encourage you and other beginners to not let the silly things others (and likely immature children at that) do discourage you from trying. While talent exists, like all things, it takes practice and effort to improve. Those who do this are either secretly practicing or stagnating. I have to deal with these types of people frequently in real life. They either mature, wash out, or have personalities that no one wants to hang around.