Former WWE superstar Matt Riddle didn’t hold back when asked about CM Punk and the possibility of joining AEW. Responding to Punk’s past backstage controversies in AEW, Riddle made it clear he shares a negative opinion, stating, “You know, I’m not a big fan of that guy either. That guy sucks at fighting and he’s a b**** to work with in the back.”
When asked to elaborate on why he feels that way, Riddle said, “Because he just belly aches and complains.” He criticized Punk for being ungrateful despite past success, adding, “This guy complains about getting multiple world title runs.”
Riddle also claimed his opinion isn’t just personal, citing insider reports from current WWE talent: “I’ve heard from my boys that still work there (WWE) that he is a headache, and this isn’t a storyline, this is the facts. So, this is what it is.”
Source: Going Ringside

I’m taking this with a grain of salt. Yeah, Punk has a rep of being somewhat of a headache. Riddle on the other hand, we’re talking about the guy who during a live Raw looked at the camera and said “I forgot my lines.” Which left a stunned Asuka standing in disbelief before walking off towards the camera.
That, and Riddle developed a reputation for forgetting spots in the middle of matches.
Riddle’s a tokehead who should’ve been lucky he had a job (and who had to have Randy Orton write an apology note for him) and Punk’s a future WWE Hall of Famer.
They are not the same.