Well yk Nintendo was first with the x & y position, but Sega did x & y reversed to keep the alphabet order I assume (so a,b,c on the bottom and x,y,z on top row for the Sega Saturn controller) and then xbox copied the Dreamcast controller (i say copied but there might have been some sort of cooperation between the two ??). The rest is history.

Really it’s annoying to switch between the different layouts for sure, but Nintendo has just kept to their standards set since they did the SNES