Board Thread:General Discussion/@comment-5397280-20131112164552/@comment-26325419-20150823233145

Contributorlatino wrote: More like "pre-college Margaret" she is the personality lacking, maneater who made Mordecai act like an idiot around women. Post-college Margaret is the now "more interesting and developed than before" character who accepted Mordecai with CJ but caused their breakup because of Mordecai's wisdom (gut) and CJ's unwillinngness to let him go

The blame of Mordecai breaking up with CJ is splitted, the three characters acted like jerks, including Margaret.