OK., OK., apart from Windows.

Bureaucracy has to be my No. 1 worst. The idea of giving officials unlimited power with no effective checks and balances, has to be the worst idea of all time.

No. 2: that would be traffic lights. Who the hell was the idiot that thought of that idea. We need to keep traffic moving, so we'll STOP IT.
Brucking filliant.

No. 3: The metric system. Units were developed over thousand of years because they are useful. So, let's throw them all away and just move the decimal point.

No. 4: Driving on the wrong side of the road. Most people are right handed, so they passed oncoming traffic on the left so that they had their right hand free to either defend themselves or shake hands with their right hands. Nowadays one would use that same right hand to pay at the toll booth or drive through. But then Napoleon went mad so everyone had to copy him.

But fortunately for America, Wellington (that's the guy who kicked the shit out of Napoleon) was pro American so they didn't send him to America in 1814. Otherwise America would have lost the war of 1812.