Before that, you should have seen the bullshit we had to go through to move the camera around.

I lived through it lol. The DualShock took what worked from the N64 controller (analog and rumble) and added it to the standard PSX controller. Which itself took what worked from the SNES controller (everything) and added another set of shoulder buttons and handles. Later, MS and Nintendo moved the left analog stick above the thumb, and that's basically where we're at so far as standard button layout goes. I'd argue that the Genesis 6-button layout is superior for stuff like fighting games, but for the most part today's standard layout is standard for a reason.