Responses

I don't think you really get it, but not everyone is the same. in his case dominating in bed was the only place he could dominate and it is the place where one can be dominated the most, so it's about making them lose their pride and "winning" over them in the only way he could. it's not about being a slut, its about making a proud alpha helpless putty begging him for something. This is to showcase the character's way of fighting for pride and being strong and how to hate alphas by making them feel weaker.
Lmaooo he hated alphas so that's why he went out of his way to be a whore and sleep with them even like even his job didn't allow it. The mangaka made it look like him being a slut for no reason was cute or sumn