I don't think it's stupid to have a reaction to stuff that happens online, but the trick is to not get baited into investing even more into whatever it is if there is no likely resolution. It's kind of vibes based, but sometimes you get someone who you can just tell is a bit unhinged and will never stop posting at you no matter how much they are embarrassing themselves. So I distance myself from whatever it is. Maybe just turn of notifications, other times I need to unbookmark the site to stay away or sometimes I just delete my account and move on entirely.

I'll also often preemptively disable notifications if I think a take is going to attract weirdos.

bonus points for not answering ‘go outside drink water read a book’ etc etc

I mean I hate to say it but these are still honest, good answers even if you've heard them before. Sometimes you just have to touch some grass.