I'm not sure what Flat means...

lackadaisical? Maybe? That's basically the way I define it.. but you and others may have a different definition.

By my definition I wouldn't call their performance "Flat". Overconfident comes to mind. But most of all... not only totally unprepared but off... and I can't explain that level of 'off'. They did almost nothing right.... the only exception that comes to my mind is Henderson... whom I thought played very well. - JamesJM