Chess disadvantages

What are the best ways to get unfair advantage in a 3 minute game?

I don't know, maybe the game ?

Everyone is hiding in a one min game for example.

Memorize 3 openings for white, 3 openings for black. Play your lines under 30 sec. Faster the better (as long as your opponent follows the line) then find for random gambits and provoke them with trash talk. Not long message, shorter the better. They will waste seconds responding. Make sure your trash-talking doesn't cross the guideline. Well you said "unfair advantage" and I feel like this is un-fair way to get time advantage. If else, get good. There is no such thing as advantage in skills. There's only advantage in time.

I like the trash talk point ^^. Looks like chess is a game of knowing the best lines.