i mean didnt mandem have pick ban advantage, so ofc they were favored to win the early maps
if it was map adv, the early maps would be banned and so map 1/2 of a map adv series would probably be map 2/3/4 of the real series and it would still be close
ofc when you get an incredible 5 mapper like that it's awesome, but in many cases, 2-0 (plus map adv) would just be 3-0 and then you're watching 45 mins extra of roll