FWIW, I don't generally self-identify as a feminist, though I get accused of being one quite a lot.
I think anyone who claims to want a better world and is vindictively hoping that some class of people with more "privilege" gets their come-uppance is doing it wrong.
That's just one example where feminism would seek to help men because it's in the interests of women. There are plenty of others, and there are more altruistic examples too.
Look at groups that discuss male victims of rape. This is an important subject that doesn't receive nearly enough attention - it's even acceptable to joke about male victims of rape on tv in a way that would be totally unacceptable if it were about women.
But a sizable number of the groups addressing this are dominated by men who try to deny the female experience of rape (rape against women doesn't count as rape because they were drunk, or they were a friend of their rapist, or because they didn't fight, etc) or they distort sexual violence statistics to claim that more men are raped than women.
Or look at groups discussing family courts. There's an unwillingness to accept that some men are abusive fathers or abusive husbands and that children or spouses need protection from those men. Family law is browen and unjust and many men are being denied their human right to a family life with their child (and ditto children their right to family lofe with father) but you need to accept one of the many reasons for that is the huge numbers of women murdered and beaten by their spouse and the large numbers of children murdered and beaten by their children.