A serious blunder was made by erasing the Justice Society from the New 52's history.
It's lazy to blame the reverse-flash
for all of Barry Allen's issues.
Teen Titans history was ruined by The New 52.
The Lobo in the New 52
The New 52 made a
by changing Wonder Woman's
Superman Changes by John Byrne Cut Off Lots of Story Possibilities
Sue Dibny's Identity Crisis Reveal was horrific
Post-crisis, Hawkman's history devolved into a mess.
The Legion of Super-Heroes emerged from the Crisis on Infinite Earths worse than before.