Frankly, as a fan who was just as annoyed when Disney declared that Extended Universe stuff 'not canon' as anyone - I don't get the hate for TFA, and that's as someone who walked out of the screening thinking 'meh' when I first saw it.
It's... Just as flawed at the OT, with very similar plot beats and a similar lack of characterisation in the first film. I'm guessing it's the old rose tinted glasses of nostalgia fueling the hatred, since honestly whilst I'm able to sprout off about Ventress, Revan and Je'dai like the best of the other nerds I've long since grown bored of the OT (heresy I know - but I've watched those films often enough that I could probably quote along I wore out the VHSs we had of those films, and the DVDs suffered a similar fate!)
It's... Just as flawed at the OT, with very similar plot beats and a similar lack of characterisation in the first film. I'm guessing it's the old rose tinted glasses of nostalgia fueling the hatred, since honestly whilst I'm able to sprout off about Ventress, Revan and Je'dai like the best of the other nerds I've long since grown bored of the OT (heresy I know - but I've watched those films often enough that I could probably quote along I wore out the VHSs we had of those films, and the DVDs suffered a similar fate!)