I don't like the term "toxic masculinity" either. It implies that there is such a thing as non-toxic masculinity, but the truth is that all gender is toxic, both feminity and masculinity. As long as we keep deviding behaviors and characteristics into "masculine" and "feminine" - and I am not talking biology here, but articifial cultural markers that change over time - we have a toxic stew in which men and women can never truly know each other.

"Femininity" and "masculinity" used to mean "the quality of being female" and "the quality of being male" respectively. I think that inasmuch as a non-toxic femininity and masculinity could possibly exist, they'd simply be going back to the sex-based definitions of those words.