Dude, Batman has been DC's most popular character since 1989, once a cb company starts making successful movies about a character, their popularity skyrockets, that's why Iron-Man sells as much merchandise as Spider-man nowadays.
That's why Batman Begins did well at the box office, despite the previous Batman movie being an absolute stinker, not to mention the fact that general moviegoers would have felt they had seen all Batman had to offer on the big screen due to the 89-97 series.
Bale's voice in TDK might get the piss taken out of it by fanboys on this site, and you might get the odd parody on some daft comedy show, but his performance as Batman is well respected amongst the general audience. Also, I have absolutely no idea how you think the ending to TDK is considered 'stupid' by people, where exactly has this been said? I have never once in my 4 years on this forum, since the film was released, seen anyone saying that ending with his self sacrifice was stupid.
All in all, it appears you are just making stuff up, and are nowhere near the pulse of the nation when it comes to Batman, apart from the blantantly obvious part about him being DC's most popular character, which is thanks to the movies.