* have lots of free time, e.g. teenagers, students, the unemployed. People with an average job and kids don't have the time to constantly be active on social media. Hence, you're reading a lot of teenage angst and people with non-traditional lifestyles. * have some reason to spend more time socializing online rather than in real life, e.g. because of niche interests, neurodivergency, specific personality traits... * have a job where a presence on social media is required, e.g. politicans, celebs, journalists. These are more likely to post provocative stuff(?)
The reason nobody is calm or cool is because those people don't post on social media. Everything is an episode of whatever that thing is you mentioned, because the target audience is 14-22 year olds that have plenty of free time to be online.
The key question is "so what?", for example "so what they all have these fake personalities", which somehow takes years to understand.