Cmon now, cyber sub isn't terrible, he's definitely better than cyrax, balanced kenshi, lackey, and several more variations.
At least csz game plan is straightforward on a basic level and effective in the current meta.
He can machine gun a capture move with next to 0 recovery and shuts down almost all other zoners as he wins every trade (mournful, pyro, and maybe pretty lady do ok I would guess not sure), not to mention the ex ice blast that catches jumps and eats projectiles, a half screen near true 50/50, some of the best mobility in the game, etc.
Yeah damage sucks, weird combos, nerfed corner game, but he ain't as bad as this site makes him out to be.
Op, play grand master sub, try mileena, and maybe jason depending on what play style you like. or maybe kitana.