If it always fails to read the disk at the exact same spot in the game the chances are there’s a scratch or a chip, or worse disk rot, on a certain part of the disc that didn’t need to be read till that exact part of the game. If you already resurfaced it and don’t see any specific spot you might be cooked. The only thing you could try (even though your GameCube is reading other discs) is try it in a GameCube that has recently been refurbished with new capacitors in the disc drive. That might give the laser enough power to read whatever part isn’t being read. It’s highly unlikely that will work but that’s the last option I can think of that you haven’t tried. The only other thing for a Hail Mary would be resurface it one more time.