This ad was not an attack on masculinity. The only explicit reference to any kind of masculinity is at the beginning when the voiceover refers to toxic masculinity.
There is a difference between traditional masculinity and toxic masculinity, and the ad showed examples of toxic masculinity, such as mocking boys by calling them “sissies,” treating women as mere sexual objects and talking down to them in a professional setting, and resolving issues or expressing feelings by physically fighting. None of these actions exemplify traditional masculinity.
The ad then encourages men to be the best they can be and shows ways they can do so, from stepping in to stop bullying to calling out inappropriate behavior to being supportive fathers actively raising kind and confident children.