The shuffler is fine. Our brains focus more on negative outcomes so we notice the time we drew poorly 6 times in a row but forget that we had drawn amazing the past 6 games.    It's only human to feel bad about bad beats but you have to learn to roll with the punches long-term if you want to stick with MTG and mana screw.    There *are* alternatives out there for people who like CCGs and *hate* manascrew.     Eternal Card Game is one I highly suggest. No mana screw/flood and fun as hell. Not quite magic, though.