Lol, fair enough.
Although I strongly disagree with the popular notion that Superman is this braindead character who only does the same thing over and over again. With regard to combo execution, he is relatively easy, but overcoming the infamous accidental Rising Grab after hit confirming a poke or punishing a low can be a mission and a half. Additionally, getting optimal timing after trait cancels is one of the more difficult techniques to master in this game, IMO. Of course, comparisons of difficulty with regard to execution are always subjective, but I am finding Flash's b22 RMS cancels much easier to optimize thus far.
From a match up perspective, people confuse using the same string with doing the same thing. Breath is -1, so choosing the correct option to follow up with, whether it is backdashing, jumping, simply walking back/crouch blocking, poking with a d1, performing an mb b3, or attempting another f23 definitely requires one to have knowledge of the matchup, a read on the opponent's tendencies, and mental engagement. You can contrast this with Batman pressure, as an example, where continuing to either apply plus frames or to go overhead or low in a vortex doesn't require much in the way of thought.
Additionally, because the moveset is so limited, the character can become predictable, so Superman players have to be very creative in order to open people up after they have learned the MU, requiring maximum knowledge of game mehanics and solid fundaments.
Holy shit I went on a rant, lol. Been meaning to get that off my chest for a while.
For the record, I have absolutely no problem with plug and play characters as a concept. It's only when a simpler character occurs in conjunction with that character being disproportionately powerful, as Aquaman was day 1 and Supergirl is right now, that it becomes an issue. For the most part, "braindead" and "plug and play" are just terms scrubs use to justify their losses. "Plug and play" as a character description should not be inherently pejorative.