Promos should have 4 games, and you must win half.

It makes sense that you should win half, because theoretically, the League System tries to balance your winrate to 50%. Therefore, you should indeed, be able to win half.

It's not fair that you have to win more then you lose for Promos, and you only have 2 lives.

Promos feel like, you are eating your sister's week old meatloaf, and you have to eat it all. You just can't.