Legal paternal surrender is already a thing; you just have to go through the courts to get it done.
I have a child who was born when their mother & I were very young. I was thrown out of my home & forced into homelessness over it.
In order to prevent my mother from trying to seize custody as the nearest blood relative, my partner & I agreed that I would not be on the birth certificate, but that - barring me losing my mind & becoming dangerous to either of them - I would still get to see my kid regularly.
I’ve never had to pay child support, alimony doesn’t come into play since we weren’t married, and if I had wanted nothing to do with the child, all I’d have to do is stop calling their mother.
But that actually took communication, effort, and reason - things that the MRA crowd are allergic to.
As for the rest: the MRM isn’t even about “men’s rights.” It’s about making women second-class citizens again, and fighting or whinging against absolutely everything feminists do.
Feminists have been trying for decades to have Selective Service either also apply to women, or be abolished altogether.
Feminists have been raising awareness & funds for men’s health issues, especially mental health.
Feminists have been trying to get men’s domestic-abuse shelters built.
Feminists have actually been succeeding in getting custody bias overturned, state by state.
What have MRAs done, as far as actual activism & fundraising? Not a damned thing.
In fact, the people who have been opposing the efforts I listed above are people the MRM counts as allies & members, primarily conservatives who believe in upholding patriarchy & “traditional gender roles” (which you folks also do, in between complaining about how efforts at gender equality are just reinforcing the mythical matriarchy you say has ruled all of Western society since long before women had rights…).
Maybe if you grew up, got therapy, and actually bothered fighting for real causes that affect men instead of spending all your time complaining about “the femoids,” you’d actually help get something done.
But I won’t hold my breath; the martyr complex is central to the MRM at this point.