Why are some users so toxic?

Noob and L are toxic words? I think they have pretty clear definitions that don't seem toxic. Maybe that's just how those kids have fun. Maybe they have more fun when they see that it gets to you.
But what do I know?

https://support.chess.com/article/209-how-do-i-report-someone
Hi,
Please report any users that do this,
Thanks

Laugh. Send them pickup lines in another language. Send them pickup lines in their own language. Send then laughter and lots of love. That's their weakness

700s players calling others "noobs" xD how frustrated they have to be to do that.
Just ignore it. Analyse your games, each of your mistakes, try to understand why exactly it went wrong. And you will eventually get better. And leave this trolls behind.
And yes, report them. I really hope it makes some difference.

a lot of people think im toxic for advertising my club but i just want some friends: https://www.chess.com/club/lettuce-romaine-calm/join
a lot of people think im toxic for advertising my club but i just want some friends: https://www.chess.com/club/lettuce-romaine-calm/join
Spam for friends. What's not to like?

Yea, it's common sadly. Even at the 1800-2100 level when I lose, they say "ezez", "you're trash kid" or "L", and "too ez, lol." They even call you names if you win 💀. It gets infuriating, even if I know I'm most likely older than them. I know not all chess players are like this, and that most chess players are honestly chill and kind people; especially in chess OTB tournaments for me. However, you can't really do anything, and the best you can do is to ignore it, and analyze your mistakes :/