That's different, Shika. That's just people who either miss the obvious, or refuse to believe that he contradicted them, even though you can quote Bruce saying many times that he wanted to inspire people with Batman, not find a new guy to wear the Batman mantle. That was never the goal. Passing Batman onto a successor after he was done.
We know that. It's obvious. It should be obvious to everyone because the dialogue spells it out in BB and TDK. But Nolan still made it clear as crystal in BB and TDK. Not only Batman saying it, but other characters, too, like Brian Douglas and the copycats. "He's a symbol that we don't have to be afraid of scum like you".
Still not everything is explained though. I'll list a few examples off the top of my head.
I lost count of the number of times people asked me back in 2012 "If Batman's character arc is learning he can't quit being Batman, why doesn't he say "I realize I must be Batman forever" at the end?" Then again, did he really need to say that? Is it not obvious based on everything the film presented? Even if he did straight-up state that, it would have only caused more complaints from people that Nolan explains every character arc.
Then there are things like Joker's complex psychology. The film makes it clear that he constantly reinvents his past - that he always remembers it "in multiple choice". The film has him state different stories twice (almost a third time), and then allows the audience to come to the conclusion that he is a "new class of insanity" by themselves (mixed in with everything else they've seen of Joker's complex insanity throughout the film). It's not like you get a scene where a psychiatrist diagnoses him and gives an explanation why he always remembers his past differently.
Then there is Bruce's paranoia. When Bruce builds that sonar device, most of the dialogue between him and Fox is filtered through social commentary. While all of that is present, it is also an essential point in Bruce's character arc, but you don't hear Lucius saying something among the lines of "Your grief for Rachel has only increased your paranoia and motivation". Nor do you get a conversation between Alfred and Fox over how Rachel's death is "changing him".
Then there is TDKR. Regardless of whether one loves or hates the film, this is the one Nolan film I
really don't understand how anyone can say it explains everything. You and I already talked in great lengths over the plot holes it has. Just off the top of my head, here are all the things that needed to be explained better and made more clear: Bane's motivation, Bane's philosophy, Talia's motivation, Talia's philosophy, the 99% vs. 1% that is dropped after the first act, the circumstances of Bruce quitting (both post-TDK and at the end of TDKR), why Bane's men are so loyal to him and what they believe in, the Dent Act, how Bruce gets back to Gotham, what was going on during "No Man's Land", etc.
Plus, is the detailed dialogue really that unrealistic? Most of the character criticized for having "speeches" are characters with supposed high intellect - lawyers, district attorneys, detectives, criminal/tactical masterminds, etc. If it came more from average Joe's, I would see it as more of a problem.