I mostly agree with you, but not with this...
feminism is basically abandoning you and sometimes even blaming you.
Yes, that's because feminism is a movement for the emancipation of women. Why should a group that is fighting for its own emancipation waste its limited resources for another group that is not fighting on their own? For better or worse, there is no political or ideological group out there which isn't prioritizing the interests of its own members first and foremost. So why should feminism be any different? Why should women have to do the work for the men who - for whatever reason - aren't acting in their own interests?
Yes, the left has offered no coherent answer to the problems of young men, but it isn't the case that they offered no answers at all: Brotherhood and comradeship, international solidarity, self-organization and the fight against the oppressors have been core values of the left for ages. Unfortunately the left was ground to dust by capitalism and the last remnants of unions and other such movements which were always meant to empower individuals are struggling. They recently saw an upsurge again, but it remains to be seen if they can make a difference in the long run.
Unfortunately as long as men, such as the gamers you mention, sit behind the computer screen and think that good things should come to them without them having to do something themselves, they will always fall for the far-right's false promises of power and riches.