Even Batista, who has managed to reach a comparable level to Cena both inside and outside WWE, noted how different things were during last run vs when he started. More restrictions, different structure, etc. When Cena, Edge, and Jericho all harp on talking to Vince, I do agree it may be naive on their part. The three of them are basically living legends who came up in a different time; of course they'd have a level of access and control over their characters that most guys working today simply do not. Like, I don't think Ariya Davari can just waltz into Vince's office and complain he's not being featured on TV.
It's interesting to me how quick everyone is to blame talent only when we all know how scatterbrained and poorly managed WWE creative can be. You can get over and they'll still find a way to squander it. Look at Heath Slater. They gave him what was probably supposed to be a throwaway story at the start, and he turned into a run that got him over huge as midcard babyface. He made the most of his chance, and what happened? They pushed him and Rhyno aside because they really wanted to push American Alpha, and then again because the Wyatt Family story needed some intrigue.
Now I'm not saying Heath Slater was going to be a WWE champion or anything. But here's a clear example of someone who did what Cena said and made the most of his chances, and the company still chose to get behind someone else. In that environment, of course you're going to have talent get complacent. It's like any job. If the company isn't going to reward your work, then fukk it. Why put forth the effort if the powers that aren't going to uphold their end of things?
And that's not me absolving talent of their responsibility. I do agree with Cena that you have to look out for yourself, and that WWE offers more chances than ever to get out there and do things beyond wrestling. Everyone should be taking advantage of that. But that doesn't change the fact that the system is fundamentally broken and places more barriers in front of talent today than is really necessary. Some people have managed to navigate that system, but I have a hard time believing that all the talent that has come through WWE's doors during Cena's time only found themselves depushed or missused because they didn't try hard enough.