From my experience it's both. A lot of them are fascist pilled or don't know that they are, particularly men. Most of them are obsessed with money or luxury in general and the opportunism is really high as far as I saw. They are also mean as fuck, don't give a shit about being nice to others, have no sense of respect (only when they maybe poke the wasp's nest too much and get punched or yelled at do they actually show some humility). But then on the other side I've never seen so many youth organisations on the left, there are a couple that are ML outright and those are student movements. One is literally called Iskra and they do a ton of good stuff like student pop-up cafeterias, protests, classes for marxism etc.
I don't have younger siblings, I do have a younger cousin who needed some course correcting after he started liking some manosphere stuff, but I caught that really early and am happy where he is at now. But to answer your question, I've seen both and not just the other.
Weather is starting to become warm and that's making me happier. I also started developing a blog and am excited to start publishing some stuff. Individually I feel good, but feeling a lot of dread for the outside world.