urgot and taric or a team with zed talon. yeah i'll take the armor/mr shred plus slow plus damage debuff tanky adc and armor buffing and shredding ad tank combo. you also had significant mixed damage. can you see how many people on the enemy team built any magic resist in the first place? zed and lee, that is it. meanwhile pretty much all attack damage enemy team.
we already know statistically that an all attack damage composition is on the bottom of the winrate for the mode, because 5 man thornmail rush is so strong compared to their rate of itemization.
that said it would be simple to surmise from the scoreboard that urgots buffs+debuffs plus your tanky magic damage zac +gragas combo were the key here amplified by the enemies lack of mr. taric clearly wan't a heavy teamfight participant for some reason, unless he was solo zoning instead of participating in any kill trade action directly. perhaps he spent the whole game splitpushing. on consideration this seems even more likely given teleport AND cs score vs k/d/a.
hard to say what happened with lux, her cs is terrible that match but her kill participation is close to twice tarics.
but honestly, no hate for talon, but as a champ he was the weakest link. poor guy needs a tiny bit of love. endgame score just highlights that(and him requiring more skill than zed to play passably well).
also nice work getting your team to clump zz'rots. sure it takes 3 or more for base turrets to get any damage without a wave, but when they are clustered they can do work.
just be glad they didn't convince someone to go off spec and build ohmwrecker, and all build banner of command. 5 baron style buffed minions immune to magic damage and 5 guys who can effectively destroy a turret during an ohmwrecker active could have done work for them if they handled it well.