Ky Schevers

Robert Stoller, transphobic psychoanalyst, thought transmasculinity was caused by an afab child developing too close of a relationship with their father, while developing a distant relationship with their mother. He summed it up as "Too much father, not enough mother".

Rad fem theory is similar in some ways, too much patriarchy, not enough positive (radical feminist) female influence. Both of them posit an outside masculine influence distorting the development of a "proper" female identity in a transmasculine person.

Both theories assume an afab person should develop a female sense of self though bonding with cis women and see any deviation from that as a problem that should be corrected if at all possible, through therapy or radical feminist consciousness raising, respectively.

Stoller didn't have much hope in "curing" adult trans people, since he thought gender identity became fixed after a certain point and also watched most attempts to "cure" people through therapy fail. He thought it might work on kids though.

Transphobic rad fems have more faith in their methods and do seem to have more "success" but they have the advantage of being a political cult that can give people a feeling of belonging, group praise and a sense of purpose one typically doesn't get from therapy.