Source: screenrant.com
1. Kryptonite
AH-HA! Turns out I AM a huge jerk who loves cop-outs!!!
Kryptonite is the source of, like, ninety percent of Superman’s defeats. And not even just those at the hands of super villains! A lot of Metropolis gangsters have blasted Supes with water guns full of Kryptonite juice or whatever was the style at the time.
Kryptonite gets a lot of flak but it’s a very helpful storytelling device and is a great way for less physically imposing villains to get the jump on the man of steel. Titano has Kryptonite vision, Metallo has a Kryptonite heart, Kryptonite Man is, um, made of Kryptonite, etc. It’s a score card evener. And a smart one at that. The mightiest man on earth and he can be brought down by a colored rock. Poetic.
And there you have it, a list of people (and… uh… things) that have felled the man of steel. Superman rules and is great, but if he doesn’t suffer a defeat at some point, then where are the stakes?

