Thing is he has said this all through 2015 in the few interviews he's done.
And he got injured before his first fight. He has to stop being like my dad, and understand he still has something to prove. I also think some of this comes from that. He's not CM Punk anymore. Whatever he proved there, doesn't count, although like Taker, he used references to MMA to legitimize himself to the WWE audience.
He has to realize that he is expected to fail, and hasn't proven shyt. Actually, it the respect he garnered as Punk that has kept these questions so normal, as well as trying to avoid his natural snarkiness. Now, if that is continued to be awarded with a grown ass "fighter" talking about Twitter trolls, then they may turn and he will get a lot of heat.
People are rooting for him to fail (majority). A few are neutral, and and some are with him. He has to take care of the last two more than he's been doing and realize he's done shyt to not be humble about himself and the sport. On this track, the first time he loses, people will run from Australia to bury him.