Why does ‘everybody’ hate Peyton?

So I’ve been a fan of the show for years and watched it countless times over and over in middle and high school, but I’ve just rewatched it recently in my adult years. Needless to say, it’s far more unrealistic than I ever remembered, but what I can’t understand after reading a bunch of discourse online about it is why such a large group of people seems to dislike Peyton so much. When I was younger, she was one of my favorite characters, and even rewatching it now, she continues to be. I don’t find the show nearly as enjoyable after she leaves. Yes, season one Peyton is “cooler,” and yes, I don’t like how the writers made her beg to get Lucas back in season 6, but at the end of the day, Brooke and Lucas were never meant to be. No, that’s not an excuse to hook up with your best friend’s boyfriend, and yes, what Peyton did was wrong, but Lucas was her soulmate and Brooke ended up finding hers (through Peyton, might I add). Everybody in the show makes drastic mistakes and betrays their friends, but I just love both of the girls. I love their relationship, and I don’t see how anyone could hate Peyton. She’s been through a lot, and yes, she made mistakes, BUT SHE WAS 16/17!!!! She’s always been so kindhearted in my eyes.
Would love to hear your opinions on this!