All of these things are one of the main stereotypical attributes of a teenager in modern popular culture, just remember the same "Breakfast club". It's just that with the development of social media and the ubiquitous proliferation of memes, all this has become more conspicuous, as well as a sense of belonging (it turns out, so many people also like to be sad, wrapped in a blanket in front of the monitor, watching a TV series). The owners of various VK groups skillfully played on this, starting to force simple pictures like "Like if you like to devour" or "Repost if you like rap", as this resonated with the audience. Gradually, all this became more inventive and sophisticated, and now we have a huge number of "sad boys" of all sorts, girls with "vino", "rummaging" and stuff like that. Teenagers have always tried to associate themselves with a group, and if earlier it was goths, emo, rappers, etc. , now these are guys like that.
Of everything in the question, only sex is primary. Lacks humor and violence. These are the three strings that the modern industry plays, as they have the strongest impact on humans - it just so happens. And since the main goal is to cut the dough, we get what is designed for a mass buyer
Probably, this is your attitude to this, from the above, only music can be attributed, because music has always played a huge role in human life. Everything is in the head.