Like, on Twitter you can write "Twitter is toxic."

On the Fedi, or on Gemini, you can write "Social media provide a web UI and mobile apps to be ubiquitous and integrate their hidden social structures to our social construction of the sovereign reality of our ordinary life, i.e. (in this context) to our psychological incorporation of the social. This to change more efficiently the way we think, to erode our ability to criticize them, in thought or publicly, and thus to have more sway on our habits. Furthermore, Twitter as every social media profiles its users and uses their neuroses (fear of death, tribalism) to increase a feeling of danger and their fear of missing out ; this production of neuroses being a by-product of the interface itself and of users competing with everyone else to get their own attention (e.g. with QRTs and online harassment), they will try to foster these neuroses with their loved ones without even realizing it."

Slightly clearer, more convincing, and longer, isn’t it?

Talking about toxicity in a social context is literally a meme derived from these carefully studied social media interfaces. They can literally put billions in psychological or social applied/fundamental research and even conduct their own experiments, not even counting the constant user profiling here.

Profiling meaning, of course, using the user metadata (likes, favs, retweets, etc.) to build social graphs and user profiles, to optimize the user interfaces towards certain targets. This is literally sociology: this specific UI element is meant for socially/psychologically vulnerable users, this other one to keep influencers on board, and so forth.