I think part of what gets lost in the translation of all this stuff is how we’re defining terms. What does “faithful” even mean? Does it mean literal translation of the source material? Does it mean taking it seriously? Does it mean staying true to the core ideas, themes and characters? Depends who you ask. Especially when we’re talking about a character/story that constantly has evolved over time and been taken in radically different directions and tones in its original medium of comics.
If we ever somehow reached the Most Definitive™ movie adaptation of the character, that everyone magically agreed was “perfect”- then what would even be the point of ever making more movies? For me, that’s part of the joy of Batman as a franchise. We’ve gotten to see so many cool versions, and they’re all valid and have left their imprint on the character. I say we’re better off for that. I think a lot of fans have a definitive Batman in our heads and we just gravitate to the versions that get closest to that. Though tbh, my love for the Nolan films has more to do with how it changed my perception of a Batman movie and shot past a lot of my preconceived (admittedly childhood-based) notions of what that could even be, while still giving me a lot of what I wanted at the same time. Dark Knight Rises and its ending flat out transformed what the Batman story even means to me. The films had a profound and powerful effect on me, so I inevitably feel a bias when comparing any other future versions. I’m aware of it, but can’t help it. So yeah, for me it’s super personal which is why I don’t like getting bogged down into “this is true Batman and this is false Batman” kinda stuff. Though I do dislike when bad faith arguments are made, or the people making those kinds of claims clearly ignore or are ignorant of the full history of the character to tear something down.