"Toxic masculinity" is a female supremacist dog whistle that is used to make a sexist insult towards men while providing plausible deniability by creating the false impression that the movement using the term has intentions to use it to help men in some way.

Then, when people who are aware that it is a dog whistle object to the term, female supremacists can falsely claim that anyone who objects is being unreasonable and making it harder to help men who are suffering. In reality, the term itself makes it harder to help men who are suffering because the debate over whether or not the term is valid ends up dividing the people who want to help these suffering men.

That is why I ask people who have good intentions to please avoid promoting the term. It is a cleverly designed propaganda tool... a linguistic Trojan horse.