I only get discouraged if I can't figure out why I'm losing, like if I get tech punished by something I didn't think could tech punish, and instead of not teching, I just figure it's luckboxing and continue. That's the joy of replays, though. :3
Basically, as long as I'm growing from the losses, I don't mind. I do mind wasting the other person's time, though... >.<;;
But, case in point, I lost 20+ matches to lain on the day I triumphantly ((haha)) returned to Melty Bread.