Honestly, nearly everyone was made worse from New 52. I just read the Secret Origins series from 2014 - and about half of the origins have already been retconned in Rebirth!
Particular offenders are Cyborg (his Teen Titans history was eliminated), Starfire (ditto), Superman (they ended up killing him off and brought back the old one BEFORE Rebirth!), Spoiler, Orphan, Red Robin (all lost part of their histories - in Spoiler's case being a contradiction as her Batgirl tenure overlaps with Dick Grayson Batman, which stayed in continuity), Donna Troy (left without an origin story - the one given in Rebirth was already obsolete because the JL/Titans writers ignored the Wonder Woman solo book), Superboy, Bart Allen (both replaced with completely different characterisations, and then the originals came back this year), and Wally West (they had to retcon the new one as being the old one's cousin).