That's Stoicism not Toxic.
If you think Zoro is a stoic character, you need to reread the story.
But
I feel like Zoro’s character represents toxic masculinity in our society, he has this tough exterior, he’s sexist (thinks women are beneath him and doesn’t respect their ability to be as strong as him) like how he treated Tashigi and didn’t take her seriously
It's not toxic masculinity either. Zoro is inhabited by a profound insecurity which is not related to his masculinity but
related to his grief:
Kuina represented the ideal strenght for Zoro, she was everything he wanted to become, the ideal personnification of strenght. This is why he got angry against her when she expressed her own insecurity, so he made her promise that one of them would become the strongest and that he would surpass her.
BUT
Kuina, the ideal representation of strenght for Zoro, felt down the stairs. This created a paradox for Zoro:
The ideal personnification of strenght suddenly was the most fragile thing there is.
He had promised her to become stronger and later,after her death, he promised her that he would pay her an hommage by become the strongest
for both of them... therefore taking the burden this fragility of Kuina within himself. This created a paradox sending Zoro into an
infernal loop (
in the literal meaning of the words) of self-critic:
He will never be "strong enough", no matter who he will fight, the fragility of humans will always remind him that a stair defeated his best friend. And when he sees women, he sees Kuina. Which is why he sees them as strong AND fragile at the same time.
Zoro is fighting with death itself, or rather... grief. He simply needs a way to let go and something tells me, he sees defeating Mihawk as the last burden.. but will it be?
