I get the surface appeal of the statement – nobody wants to be around someone who's just bitter and petty, and I agree that stewing in pure spite is corrosive. But I think the whole saying misses something important. It turns real anger into something shallow, like the only reason anyone ever dislikes someone is to win a beauty contest.
Here's the thing: when someone treats you badly and you hate them for it, that's not about trying to look pretty. That's about drawing a line. It's self-respect. And self-respect, honestly, reads as pretty in a way that being endlessly passive never does. So the phrase "hating me won't make you look pretty" is basically just a way to dodge accountability. It frames your own bad behavior as the victim's problem.
Hate isn't always ugly. Sometimes it's just honest. And honesty, even when it's harsh, tends to look better than fake sweetness. So I disagree with the statement – it's not that simple.