Their armor plus ap plus cdr item helped them win the game and not the fact that it was an morgana luc against a jinx and thresh, huh?
And merc treads is plenty of magic resist, I started a doran's shield, and I had early life steal from a vamp scepter. I left lane 0/2, which was good considering how terrible my jungler was.
And theres also the fact that zhonya's is just a flatly better defensive rush item than any of the options ADCs have. 80 AP, 10% CDR, an extremely useful active, 45 armor is a thousand times better than hexdrinker that only gives 35 me(so a whopping 10 more MR; much help, very useful) and only 25 AD. And maw is generally accepted as a shit item. Wits end meanwhile gives plenty of MR but no damage; theres only a very measly on hit affect that steals MR(very useful on jinx for all of the magic damage she does, whoo boy let me tell you) and gives a bunch of AS. So you wont do damage because neither of these are intended to be rushed by anyone at all in the entire game with the exception of hexdrinkers on Assassins(who have absurd AD ratios and base damage on their abilities so the 25 AD will actually amount to something).
Also no, they didn't rush mr/armor items that game. You can clearly see where the lux rushed a ludens and Mr pen boots(which would have rendered any MR I bought after Mercs pretty fucking useless).
And there is no other build for jinx beyond crit, you simpleton. I bought first for lane(which is why there are mercs and a vamp scepter) then I got my crit(for the true damage or did you forget about that?) And by the time I was going to be able to actually buy anything else, my team decided to let them get baron and then left the lux to free push top.
Furthermore, I'm not the only applied of gracious wounds for my team; no bramble on garen, no morello on the brand jungle(also nice job not noticing that might have helped them win too), and no executioners on the Lee sin. Clearly it's all on me though.
Feem free to continue proving your ignorance however.