Fedi Meta | Shitposting
There is absolutely nothing wrong with shitposting itself, the toxicity comes from the mean-spirited inhumanity, and irony poisoning that bad faith actors engage in.
They call it shitposting, I call it social poisoning. Real shitposting is innocuous and unmalicious.
So if the bad actors tell you that their toxicity is shitposting, they're lying to you and their toxicity is probably radioactive too. Be cautious when dealing with them.