You simply demand the full game with most of the teams stripped as a demo.
The lack of settings for the demo is of course not a good thing, but it has been like that for years, seems it works for KONAMI. There's halfway fix for this:
http://www.pes-patch.com/2010/09/pes-2011-demo-tweak-v1-0-by-mxsonic.htmlWhat makes you think this is an unpolished console port? As a soccer fan you should have played one of the older iterations and not have to resort to such assumptions.
It's not keyboard friendly, but that's it as of "unpolished port".
If you can't get past the button mapping, use some third party app for that.
I'm not a soccer fan but i really like this series of games.
Do yourself a favor and try out last years edition and leave that boring on-rails thing named FIFA behind.