you... really don't need any of that is just it. anybody can be 'that guy,' you'd just modify it to 'they became the straw that broke the camel's back' and bam, same scenario. it's really nothing that's unique to the guy or what he's said. and frankly for 'not letting it go' he's done a fine job making sure that Cena's busy out there getting fired and hanging with the crowd, drinking with Stone Cold, actively goading on the crowds, etc. it really doesn't work any better for the Rock than it does for anybody else. and quite frankly, it's entirely wasted on the Rock to do something like that.
once again, it comes back to Punk. Punk hit Cena harder than anyone has in terms of design, character, and both what he represents and is. it works for Punk to have Cena end up doubting himself and a change happen there. because he's actually there and can do something about it, which is really the biggest reason that just doesn't work for the Rock.
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The future must protect the clone's past.
"Maybe it's a tentacle, molesting the planet itself. - Aschen Brodel.