Well, that's impossible. Don't believe me?
I'm getting this from my other comment.
Syndra full combo with 7 spheres is
1980 + 345%AP
Jhin has 1985 hp at level 18. You had 30+13+40=83 MR. With PD her damage would be reduced to (100/183)*0.88 = 0.48 48% of her original damage.
That is 950+ 166%AP.
So, to deal all of your HP as damage, she would need 1035/1.66=623 AP to kill you (assuming no penetration, this I calculated just for fun).
I can't find the game you're talking about in your match history, so let's assume her build is something like
, which is a reasonable Syndra build. There she has 634 AP.
There she has say 15 pen from sorcs+ 15 from runes and masteries+35% from void staff. Since you have 83 MR, that is reduced to 24 effective MR.
That means her damage is reduced to 70% of her original dmg (with PD).
Now, since you have Maw, that means you get a 353 hp shield for free. That means your effective hp is 2338 (not counting MR).
So her damage becomes...
(1980 + 3,45*634)0.7=2917 damage. Wow. 579 less damage and you'd live. That's a single ability's worth of damage. That means a support shielding you means you live. That means dodging ANYTHING would have let you live. A GA would have let you live. Someone standing next to you would scare Syndra into letting you live.
Now please explain how you managed to get hit by her Q, her W and her E and how she then didn't die after getting in range to ult, and how you didn't hit a single auto attack to lifesteal.