the amount of hatred the entire Weasley family got was astonishing
if you're unfamiliar with 'Weasley bashing', there's the assumptions of one or more of the following
1) Dumbledore paid Molly to get Harry's attention at Platform 9 3/4
2) Molly planned to give Ginny love potions (or did do so) so Ginny could drug Harry to get his money
3) Ron was paid to be Harry's friend
4) Ron drugged Harry to make Harry...not into Hermione or something like that
and all of their negative qualities were ludicrously exaggerated
sometimes it would be restricted to just Ron, Ginny, and Molly, but sometimes it would include all of them, even Arthur, possibly the least offensive character in the whole series.
Insane Harry/Hermione shippers were the biggest promulgators of Weasley-bashing. They also enjoyed Dumbledore-bashing, which is more justified because of his legitimately shitty canon actions, but in doing so they turned an interesting, flawed, occasionally morally ambiguous character into a flat evil one who poisons children with candy.