Honestly I feel there was far too great of a hatedom for Jar Jar. More, that I never saw him as nearly as annoying as others did and I do feel he had his purpose and thus not useless.
Edited: Thomaslee on 4th Jan, 2017 - 5:22am
He's not incredibly horrible objectively speaking. But he is bad, he feels very much out of place, and enough went wrong with episode 1 that he became a symbol of its shortcomings.
So no, I can't claim to be surprised that people formed something of a vendetta against the gungan.