Worse than Kabal and Kenshi? .
Kenshi is not broken. Does he have 1209847120% resets with one net catch? Or how about 100% unbreakable combos?
Kenshi is designed to be a zoner and he's just very, very good at it. You mission is to get in on him. Tough for characters without great armor or teleports (sub zero) but that's just... TUFF TITTIES for them.
Kabal isn't broken in the same sense as Cyrax...
Cyrax is broken b/c of junk you shouldn't be able to do (see above sentence). Kabal is broken b/c of bad character design. It's like they couldn't decide if he should be a zoner or a rushdown character so they made him both and they made him the best at both. Thus, no matter what you do... you don't have a clear cut strategy against him, that's OP, and thus broken.
All that said... I'd rather face a cyrax than a Kabal or Kenshi. lol