I don't think we should castrate men against their will, although I would if I weren't an anarchist. As it is, I think it would be a good social norm for men to take testosterone blockers.

I'm not sure what "men are inherently violent" means. I think that testosterone makes people more aggressive. Adult men with typical levels of testosterone are more likely to be violent than people with lower testosterone levels. Men with very low testosterone levels are not particularly likely to be aggressive. Aggression is not inherent to being a man, but it is caused by a chemical that's found in larger amounts in men than in women.

I do think we should discourage toxic masculinity, and I do think it's responsible for some of the difference in aggression in men and women. However, I think that testosterone also plays a major role.