It also doesn't help that there's a portion of feminists who are super extreme and basically just use feminism as a cover for man hating, which tends to push away young boys from real feminism.
I think there are a lot of layers to it tbh, the right promises young boys all of these things (that are bullshit) and tells them they are #1 and they matter most while in general left people tend to say that men (even moreso cis white men) are the problem, which tends to alienate those people.
As a very left leaning cis white male it does feel extremely lonely, I am very depressed and never feel like my feelings are valid. I can't point to a boogeyman and say "that's the reason my life sucks" cause I'm the boogeyman and the only reason my life sucks is because I suck.
It's right wing option is just earlier mentally for boys to handle.