This blog post nails the feeling I've had as I encountered some social media posts. It's especially glaring when it comes as a response to a rather normal sounding post. I bet this person's explanation of why this happens so often is correct and it is remarkable to me how the flame gets fanned on and on. It keeps the money flowing to the owners of the sites.
"There is a specific flavor of overly cool, casually careless, sarcastic, flippant, at times vitriolic undertone to everything that is hard to describe and pinpoint, mixed in with the latest meme speak (L, ratio, touch grass, etc.). Language formed throughout the years to attain maximum engagement within the culture of Twitter or Tumblr. The way they behave feels like it is part of a huge collective hivemind and makes them feel inauthentic and replaceable. If they didn't have different usernames and bios attached, I would not be able to tell them apart."
Interesting thinking on this blog: https://blog.avas.space/online-interactions/