tbh my first reaction was "lol this isn't just straight dudes, go ask my bi enby ass about feeling dead inside." But you do have a point, and i think being raised as a boy has saddled me with a lot of the problems you're describing that i'm still working through in spite of having been able to emotionally open up more ages ago, in spite of having a decidedly nontoxic circle of friends, in spite of always having been an introspective person more aware than the average dude of what's going on inside me.

Admitting that patriarchy also harms men in very specific ways doesn't detract from adressing the problems of women and nonbinary people. Believing otherwise would mean to fall for the liberal fallacy of pitting people against each other over who's more oppressed when the only viable leftist answer to oppression is universal solidarity. Dismantling patriarchy is a necessary part of overcoming capitalism, as it's a core element of the superstructure maintaining capitalism and you can't dismantle the patriarchy without adressing all of the harm it does, including the harm it does to men.