I think that you can leave reddit and do other meaningful things as well. In fact it might even help you do so. And being a little dramatic might just be what some people need as a push to do it. I didn’t get through all of this either, but then I have already left there.
There are limits to free speech just like there are limits to other freedoms. For example: “The right to swing my fist ends where the other man’s nose begins.” IOW where harm is done. So the question becomes do messages like this cause harm? IANAL, but I believe that it would qualify as hate speech, which is widely considered to cause harm.