Most Helpful Guy
Feminist ideology makes money for the government and protects the status quo.
MGTOW ideology, if implemented, would cost the government billions and billions and billions and would be a constant, existential threat to the status quo.
Feminism tells women to divorce men and marry the State, essentially. MGTOW tells men to divorce women AND the State and just stay single.
So of course the State has a vested interest in promoting feminism and censoring MGTOW, but it's not because they actually care about gender issues, it's just one side butters their bread, the other doesn't.
Most Helpful Girl
YouTube is a private community which you must agree to the rules of when you join. They are perfectly entitled to remove speech they don't agree with, for really any reason they want. They actually let quite a lot of quite inflammatory, offensive, sexist videos remain. They just have a line you can't cross in your rhetoric, and it IS up to interpretation. Lib and feminist videos get pulled down too. MGTOW are doing a perfectly good job of getting their indefensible message of sexism into the cultural vernacular. No one is really impeding them.