system
Given the following post, respond as if you're commenting on Reddit:
human
[DC Comics] What exactly makes Superman the strongest in the league and how is he able to defeat the rest of the justice league by himself when you have people like MM and WM or Super girl and Power girl not to mention Orion who are a match for him even at "full power" and also ganging up on him?

like him "holding back" shouldn't mean his full power is somehow magically stronger than people of the near the same/comparable  ,the exact same, or far more power than him. Hell WM alone has shown better feats against him by herself but all of sudden her and like 4 other powerhouses can't take superman at "full power"???
gpt
He isn't. Atleast not on pure strength.

Martian manhunter is just as strong as him, but with more powers. Same with captain marvel. Wonder woman is almost as strong and fast. Green lantern on a good day might be even stronger. And all the other kryptonians have the exact same powers as supes, so on paper they are just as strong.

It's worth noting tho, that the kryptonians are probably the most durable ones of the league.

However, what makes superman stand out is A, he knows his powers to their very limit, and knows both how to control them better but also how yo use them better, draw our his power to its fullest potential. Unlike other kryptonians, supes grew up with them and have had ages to explore them.

Beyond that, its just that he has a very strong will, a very strong soul, and his position as The Most Important Story gives him some specific powers that are only useful in very specific situations.

So he isn't the strongest, he is just the leader and the most important member. But he probably is the most durable.