There is nothing toxic about masculinity. There are toxic people. That's it.
Does "toxic femininity" exist?
'Toxic masculinity' doesn't refer to masculinity being toxic in some holistic sense.
It refers to certain harmful concepts promoted or taught under the guise of masculinity.
Masculinity...like many concepts...is an umbrella term which ranges in meaning. Many of the things I was taught under the guise of 'masculinity' remain things I view as strengths, and things I can build my concept of self worth around.
Other things I have been taught under the guise of masculinity have clearly been harmful, and I've seen these same things have even more impact on others around me where they are less reflective, or where they are overly reliant on others to establish their self worth.
As a simple, anecdotal and purely personal story, I was taught in no uncertain terms that a man had to take responsibility for those around them. I don't see that as toxic (some may, but I care little about general opinions).
I was also taught that men needed to be stoic, have a 'stiff upper lip', that they shouldn't show emotion, and that emotion was basically weakness. The same people who taught me this did not teach my sister or female cousins anything like that. This has nothing to do with my personality or circumstance, and everything to do with my gender.
That's a toxic representation of masculinity, imho, even whilst I can see some of the masculine qualities they instilled in me are NOT toxic, and are things I value.
I have no boys...three daughters instead...but even with nephews and friends boys I am cognisant of what behaviours I encourage. I remain somewhat unemotional in some ways. It's not easy to change that...but I don't need to perpetuate that needlessly.