Firstly, it is very often overused. It is often used to refer to any masculinity regardless of its toxicity or any toxic behaviour regardless of its connection with masculinity. Sometimes feminists simply ascribe this trait to any man who criticizes feminism / who has different views on something / whom they don't like. The term "toxic masculinity" has become very vague and is often used as a tool to spread hate speech against men.

Secondly, the term "toxic masculinity" and especially the rhetoric that accompanies its use has an undertone of victim blaming. For example, when someone says that men themselves are to blame for the problems that disproportionately affect them, such as shorter life expectancy, high rates of suicide, alcoholism and drug addiction, etc. — like, they shouldn't have been toxically masculine.

"Toxic masculinity" is often viewed with the emphasis that it is something internal - something that men have in them and should give up.

The truth is that "toxic masculinity" is something that at first is external and then becomes internal. At first, a little boy is constantly bullied by his environment which shames him for behaviour that, in the opinion of this environment, should not be characteristic of a man. And then he internalizes these ideas and starts shaping his behaviour in accordance with the threats he constantly hears from others. First he receives a large number of sexist messages and then he develops internalized misandry (plus often misogyny, as gender stereotypes are usually two-sided). In adulthood, he continues to deal with sexism directed at him, and his behaviour and character are reinforced.

Narratives about "toxic masculinity" often show an unbalanced view on these two components, with an unjustified emphasis on the second (internal) one. The fact that men are bullied because of their gender throughout their lives is ignored or greatly downplayed. Males constantly receive messages from others about how they should behave in accordance to their gender — from shaming for fear, indecision or displaying some "unmanly" emotions in childhood to societal pressure to be a protector and breadwinner in adulthood. And this sexist bullying is often accompanied by violence — from being hit in the face by peers just because you are a boy (it is not acceptable to hit girls) in childhood to institutionalized slavery in the form of mobilization in adulthood (Ukraine is one example).

English is not my first language, sorry for mistakes if there are any.