My favorite story about Punk being a fake tough guy is while he was still in WWE.
He was champ at the time and always refered to himslef as "the locker room leader". E.g. he would come into the locker room and if there was an issue he would start off his opinion by saying "as the locker room leader bla bla*. All the while the locker room still had more tenured people there like Booker T.
Well, one day the issue of throwing trash in the locker room was broight up to Punk. And he said: "as the locker room leader I say that everyone has to pick up their trash!"
Booker T literally took some thing from his bag, threw it on the floor in front of Punk and said "I ain't picking up shit." lmaooo