Young men, of all generations, and all eras, suck. Gen Z women are just smart enough to talk about it in public, rather than suffering alone.
I always found the whole Incel claim that blames women for 'blocking them' or claims they aren't attractive to women to be patently absurd.
Granted when I was a young guy I was a bit of a looker and most of my high school friends were female (took me a few years into adulthood for some of them to fess up that they'd been trying to get my clueless attention...). I've always found women friendly, but not just to me.
After all I also was a gamer and had several gamer friends who through either bad luck or bad habit looked like they'd lost a fight with a train or smelled like they were hosting their own zombie apocalypse inside their drawers... and these guys, back in the genX days, had no trouble finding women to talk to or date.
"Somehow" while the guys I would game with looked and in one case also smelled like the poster boys of an Incel advert or a 'loser gamer geek' meme, they had winning personalities. I think half of that "somehow" was growing up before the Internet went public, and the other half was having good parents to teach them how to behave around women.
The whole "Incel culture" is a self inflicted wound, driven by social media nutcases.
I'm not so sure GenZ women are talking about it more just because. More that they're dealing with a bunch of self-harming men who have "abandoned the field" on the orders of the people they follow parasocially.