I think the title of this article is a little misleading. Sure, he's not looking forward to the process of transforming back into character, but he's not really being as negative as I expected when I clicked my way here. And a lot of big budget films are bad. Hollywood is a factory that repeatedly churns out inane chick flicks, action films that lack decent plot and dialogue but attempt to keep you distracted with CG and explosions, and horror movies with painfully bad plot holes.
In terms of not liking all the workouts and bulking up, it's just a trade-off. You can be rich and famous and have awesome roles but you have to work to look the part, or you can be a regular person and not have to worry about it but also not have an acting career and tons of money. We all complain about work now and then, I see no problem here.