But the flaws are supposed to be quickly excused, and the failures rarely seem to be genuine. (a)
I don't know what "challenge" would mean in a context where we know that the protagonist always wins in the end. However, he does seem to have superhuman qualities despite the constant assertion that of course he always "earns" a victory because he doesn't have superpowers-- unlike most of his peers. (b)
Maybe they don't get vilified. Much. But at the end of the day, you know it's going to turn out that Batman Is Right, and that whoever questioned him will probably have to admit this. Oh, and feel this deep bond with him, however reluctant. (c)
Fine. Maybe it's a different catch-all/archetype than "Sue/Stu." But for me, it comes closest to encapsulating the annoyance I feel just about every time I encounter the character in scenes like the one above. "Oh, tall stranger. I already want you and I can't even see your face!" Geez. Overkill, thy name is Batman.