I support the premise of the article but the points used to prop it up are flawed better title would be "Batman didn't always win and that was okay"
Pre 52 Batman was clearly not the top dog of the DCU numerous martial artists were above him and he had a lengthy win loss record against them. Deathstroke beating Batman in post crisis continuity is fact but I'd like to point out as of the new 52 Batman is far and away the top dog and most people have every reason to believe he can do the things that fanboys have always said he was capable of.
He's beaten a much stronger Bane
He's beaten the entire Justice League(with little prep time)
He's flawlessly played darkseid like a fiddle and knock him on his ass
He's pretty much done everything a legit Batfanboy would every want him to do at this point.
No Batman doesn't always win but now its become the expected outcome and for good reason