OP asks,
Are there any men out there who feel the same concerns as us.... not necessarily on behalf of women... but for themselves? Or for their daughters and sons?
I am a man. I do not claim to speak for all, most or even many men, but I know there are some men who feel the same concerns. I do not engage at all with social media, Twitter, Facebook or the like (apart from I am surprised to notice Mumsnet), so my perspective is limited to a fairly small set of worldwide friends, family and acquaintances and what I see in traditional media.
Feminism? Of course I support women's challenges to patriarchal structures and mistreatment. Why? The obvious reasons: in general , the way women are mistreated is wrong, so there is a moral imperative to try and change; in particular , I have family and friends I love, some of whom are women and girls (!), so I care personally about these wrongs.
Like all my family and friends, and most of my acquaintances, I am politically left-wing. I used to be politically active on the left, to different extents at different times in my life. Now I am too old for anything but the personal. But I support younger friends, children and grandchildren, in their struggles. Some of them do more than others ... I am proud, particularly, of my daughters, who fight the good feminist fight in their professional and political lives at the same time as bringing up their daughters and sons to see the world aright and do good. (I sometimes congratulate myself and my partner for how we brought up these wonderful human beings -- I am losing the capacity to see 'smug' pejoratively as a qualifier of 'parent'.)
Transgender ideology? At first it seemed just a bit of a laugh -- grist for my mill of collecting absurdities and logical nonsense. Then (MN partially responsible here) I noticed its deleterious consequences and got worried, again both generally and personally.
It seems to me now near the end of my life, not to mince words, that women (my daughters and granddaughters in particular) are the hope of the world. Sons and grandsons I tell to take due note of this; their world will need the women whose skills, intelligence and sensibility would once have been wasted by misogyny produced out of male fear. Compared to this, transgender nonsense is a sideshow. But it is still nonsense, and it will continue to have bad consequences for women and girls if left unchallenged and unchecked.
So more power to your elbows, gender-critical feminists of Mumsnet!