The idea that abusers "cannot navigate masculine environments well" is absurd, ignores the fact that much abuse has taken place in masculine environments throughout history, and imagines that abusers somehow give themselves away by not presenting as traditionally masculine. Where are you getting this?
Abuse, e.g. sadism, opportunism, deception are all definitions of unmasculine behaviours. There are men who behave in unmasculine ways, and I'd reassert they usually disqualify themselves from deeper friendship with men who don't. Among men, I would also say that negative traits are necessarily also unmasculine because they are usually immoderate instances of other qualities.
Of course, this is a practitioners view which perhaps does not reconcile itself to theory.
I'm having trouble following you. The behaviors you describe above are neither 'unmasculine' or 'unfeminine'. They are behaviors that can be evidenced across the gender spectrum.
