Each round will consist of 2 stages. The first stage each player will be given 2 sets of pairings, in which they play a first-to-2-wins (best of 3 excluding ties) vs both opponents. After the first stage is completed and the host has determined wins, players who win both their matches go through to the next round, while players who lost twice are eliminated. The players who won 1, lost 1, battle it out in a tiebreaker Bo3 in stage 2 to join the two-time winners in the next round (or the player wins the tournament in the case of a final). If a 3-way final, a 3-man Bo3 round robin will determine the winner of the tournament (repeated if necessary).

Tournament Format : pseudo-double elimination (64 man as an example)

Round 1: Stage 1 - 2 sets of 32 FT2W matches (64 unseeded players, subs period) & Stage 2
Round 2: Stage 1 - 2 sets of 16 first-to-2-wins matches (32 unseeded players) & Stage 2
Round 3: Stage 1 - 2 sets of 8 first-to-2-wins matches (16 unseeded players) & Stage 2
Round 4: Stage 1 - 2 sets of 4 first-to-2-wins matches (8 unseeded players) & Stage 2
Round 5: Stage 1 - 2 sets of 2 first-to-2-wins matches (4 unseeded players) & Stage 2
Finals: Stage 1 - 2 sets of first-to-2-wins matches (2 unseeded players) & Stage 2
Stage 1 End: Players with 2 match wins go through, and those with 2 losses are eliminated.
Stage 2: Players with a 1-1 record play each other in a FT2W match to see who progresses (or wins the final)

TL:DR
You play two Bo3s each round against two different opponents
Win both Bo3s in Round: Advance to Next Round
Lose both Bo3s in Round: Eliminated from Tournament
Go 1-1 in Bo3s in Round: Play in a final Bo3 in Stage 2 - winner of the set moves on while loser is eliminated