Ooooooooorrrrr maybe your character has a really bad matchup against sub zero?
IMO SZ doesn't have a single 7-3 matchup in his favor in MKX and I consider, in general, 6-4 matchups to be winnable if you know your character ins and outs, so a 6-4, against you, isn't the end of the world if you've put the time and work in with a character. That's why loyalists can take on bad matchups and still come out on top.
There's no way you're serious. ...are you?
The part with only the elite can be good with SZ is just an exaggeration but he did nail the part where SZ exposes how good your fundamentals are when you face him.
You see Sonya players prey on over aggression and bad spacing with jump back divekick all the time, that's what the klone does in a nutshell, you jump too much, you don't space yourself properly, you miss time your attacks, you're overly aggressive, all that gets you into the klone.
That's why scrubs will always have a bad time vs SZ. It's been like that since MK 3.