Because it makes men seem like perverts, creeps, rapists, sexual harassers as the default setting. As if this kind of behavior is standard for all men, when most men are honorable and normal. Especially older dads at a BBQ. I mean, really? These are the people who are enabling women getting raped and harassed? Fuck that, its a very small percentage of men who are serious sexual deviants and they aren't being shown in this ad.
Guys are assholes to women? Great.
Women are cunts to men.
Same thing. Its a push and pull dynamic. Don't act like the bad behavior isn't on both sides of the coin.