Is mGBA really accurate?

I’m hearing that mGBA is the most accurate GBA emulator but i already had 2 games crashing out of 10 or so i tried.

Big Mutha Truckers crash when i press start. Payback crashes when a vehicle gets enough damage (or it could be random, i don’t know)

Both games worked fine on VBA. So maybe the retroarch core is bad? BMT still crashes on the standalone emulator but Payback works fine.