I'm doing some research on the MTGO meta and I wonder which are THE WORST matchups for each deck, like nigh unwinnable bad. Be specific enough, not just like "Deck X loses to counters."

Feel free to contribute match-ups and/or other decks to the list:

RUG Delver

BUG Delver

UWR Delver

Goblins

Shardless BUG

Jund

Maverick

D&T - Elves

Miracles

Esperblade

Deathblade

4x Lands/Loam Control

12 Post

Burn

Belcher

Oops! All Spells!

Painter

Elves

Storm

Reanimator

Sneak & Show - D&T

Omnitell