Chinese Ultras

Since I'm currently in China I've been randomly browsing bilibili and under certain videos I have been noticing a certain insufferable group of ultras somehow even worse than (what I've seen of) western ones, who can obviously afford a device and internet yet claim to care for the poor oppressed masses and talk about how capital is destroying people's wills to live and stuff, and continuously use the term 'downtrodden masses'. One even said that modern society was just like in Lao She's Teahouse (where a lady had to sell her child to survive), and shifted the goalposts when asked about this by saying 'muh abductions!111!11!!

What I would like to know is, who are these people? Why are they like this? Given that most have obviously not experienced for themselves the massive improvement in quality of life between the 2000s and today, are they mostly too young and have too much free time, or are they petty bourgeoisie who also have too much free time? Am I looking at them the wrong way?

Would appreciate insights from those more knowledgeable than me, thanks.