the problem isn't that he has a lot of girls, but that he's cheating. he can have 100 girls & as long as it's a harem & every girl has consent, everyone will be happily rooting for him. the problem is he's promising to marry pink girl, then as soon as she turns around he goes to other girls & hint at marriage too. & when they turn around, he starts scre**** other girls too.
you can have a massive orgy with 12 girls & that's perfectly fine coz they're all on board. but if you're cheating with your partner, even if you just have 1 side chick, you're a horrible human being.