I've had a couple of opponents recently who got horrible luck against me, it happens, sometimes my virtual dice roll like i've loaded them myself. :)
The coaches reactions though have been very different. One complained relentlessly and asked me to stall out the rest of the half (something i believe to be non competitive) whereas the other mentioned the dice once or twice but never seemed upset or downheartened by it, he chalked it up to just being BB. I left one match fuming and spiteful and the other cheerful and upbeat. I won both times and yet my enjoyment was drastically different.
I guess my conclusion is that it really is the players (coaches/opponents) who make the game.