@ArpanaR
It's not about getting better than the girl.
Men are competitive, with a desire to prove themselves (prob. due to evolution) and that becomes aspiring to be worthy of the girl for ex. Urguayan Luis Suarez meeting his (future) wife who was from Spain, dedicating his life to football (at Groningen, Ajax, Liverpool) to get to Spain. Women (and having kids) force/inspire to men to push themselves or at least be a better version of themselves (- biting people) in most cases
for every example of toxic masculine culture, there are examples of men getting their life together because of the women in their life. It is a bit mad but I suspect it ties into our ancient brains