Barry's dead mom was always a dumb decision because they never followed through on it other than dead mom angst. But in addition to that it screwed up any sort of dynamic he has with Eobard Thawne because he's now only known for this. So at the end of the day the two are jerking off to the same issue without any ability to move past it. The dynamic is fairly one note as Eobard suffered the same fate as Green Goblin.
Identity Crisis and the rape of Sue is also one that's at the top of the shit list.