hey mate
the team ratings and matchup ratings are just there as indications as to how you played. they are sometimes way off, as it shows in your case.
your opponent played full court press, hoping that your players or perhaps knowing they have low handling and or passing skills. probably he has higher stamina levels too, so that his FCP hurt you more in the 4th quarter than it did him. Your players getting more tired than his and creating more TOs...
I wouldnt worry to much about this loss. it happens but it wont happen alot more often, unless your players really have very bad handling and passing skills.