It's like that song in Pokemon XY & Z. You learn from a lose, which is part of the game. You win or lose, so long as you have fun with it. Loses are especially useful, since you not only learn about your tactics, but you learn about your opponent's stragety and how they battle. So regardless, it's a win/win!
That even applies to Pokken, lost to a A3 Mewtwo Trainer multiple times, but after awhile of training, trying new tactics, and understanding Mewtwos and their abilities, I ended up beating him in the end.
Oddly... it can be fun, if one thinks that way. I'm a VERY odd one. XD