The term "toxic masculinity" creates a subliminal negative association between "male" and "toxicity".

Although you can rationalize the association away, it still exists and influences listeners. It's marketing against men.

If you really wanted to address issues with hyper-agression, you would use the term "hyper-agression", which is gender-neutral.

If you really wanted to address the consequence of not asking for help or compaining, you would perhaps use the term "stoicism", which is gender-neutral.

If you really wanted to address people overly affected by irrational fears, you would use the term "neuroticism", rather than "toxic femininity"