So are we talking about competitive games still ie tournaments, or casual games without much in the way of stakes?It's a themed deck.
I tend to buy Magic by the booster box - you make a good saving, and typically end up with most, if not all of the cards you were wanting.
That done, I then see which art and creature type tickles my fancy, and knock a deck together.
But my point here is about the attitude of the player, and how that has a massive impact on the enjoyment of the game.
Someone who flattens your army is one thing. Someone who flattens your army with beardy units, dodgy rules interpretations and a 'compared to me you are nothing, I don't know why you bother to play, I AM THE MESSIAH' type attitude is quite, quite another.
You can get knacked by sheer, dumb luck in most non-Chess games. The cards just don't come up. The dice get into their tiny minds to gang up on you. You can get knacked by a better a player, one who really knows how to stacks the odds against you. And that's all hunky-dorey and makes you a better player overall, because you learn something.
But a showboating WAAC cretin? All I learn is that they're a bit of a Richard, and probably not someone I'd care to play again. It's not even worth playing them to beat them - because they suck all joy out of the victory with meaningless terms like 'you diced me' and other ways to detract from your skill as a player - because in their pathetic little mindset, nobody but the gods of fate can possibly usurp them.