You have to look at the Liverpool goals. Yes, one was an accident, but one was a penalty; you're not expected to save them as a goalkeeper. Another was a deflection; he had no chance of keeping that one out, and the fourth Liverpool was actually very well worked and a good finish. On another day that deflection might have gone wide, on another day that might not have been a penalty. Don't over-analyse things; this is football afterall, its a strange game.