First off Blitzball is impossible. Balls just wont move underwater like that no matter how hard you kick them from underwater and they never explain how the huge sphere of water is even possible nor how the characters are able to hold their breaths for several minutes at a time. I know that there are people who can hold their breath underwater for like 20 minutes or whatever but those people aren't playing freaking rugby while doing so.
That and they advertise the game in the intro as some cool fast paced, adrenaline pumping, extreme sport while the actual game version is just a bore. You spend the whole time managing numbers and numbers and what's actually happening on screen barely matters as long as your boring ass numbers line up right. It's like playing an mmo but without any possible entertainment or benefit of an mmo. Madness.