I played mill combo in the Standard Metagame challenge. Mistake? Metagame Challenge Bo3 Standard

Rupture combo is my pet deck that I've won a number of RCQs with and I take it through the standard metagame challenge on arena. Lets have some fun! 0:00 Deck tech 2:41 Match 1 14:02 Match 2 23:18 Match 3 36:10 Match 4 42:16 Match 5 52: 12 Match 6 1:01:55 Match 7 1:18:19 Recap