At face value I thought the costume design looked like low budget cosplay, and the direction gave the vibe of a student film. Everyone looked ridiculous and the choreography sucked. It was sorely missing the style and charm of the anime.
Watch the mariachi trilogy and think about what a good interpretation of bebop could have looked like.
The problem is that you can't put ridiculous characters in the real world since the world around them will still be 'normal'. This makes everything else that doesn't really make sense outside of a created world look bonkers.
Take the trope of ridiculous large swords that supposedly are just made of metal, and are heavy, but somehow the thin and slender wielder can swing about with ease for hours on end because 'they trained for it'. There is no scenario where you could adapt that to live action without it either being completely ridiculous or modified to an extent that the existing fanbase will hate it.
This is the problem with many plotholes and plot devices that are used inside non-live-action and non-scifi media where it simply breaks as soon as it is taken into live-action. Some of it stems from the never-ending use of serial/procedural series where the main characters need to remain the same for a long duration (and as such no real damage or change can be made), while other issues are mainly due to the huge gap between reality and unexplained differences.
It's one of the primary responsibilities of the movie to set up a universe that is compelling and believable. The fact that it's live action imposes some constraints, but they can be creatively worked around.
Just a few movies that do this well that come to mind:
They were trying to pull off Robert Rodriguez without actually having to pay Robert Rodriguez when they would've been better off paying Robert Rodriguez to Robert Rodriguez.
Watch the mariachi trilogy and think about what a good interpretation of bebop could have looked like.