You will never win with Marrone, Hackett and Schwartz. Hackett especially.
Just one example - but one of many. Half-yard to go and you punt to give the ball back to the gd Chargers and Rivers at the 11, when you MIGHT have made it at the 42. That's all that needs to be said, other than S's defence was horrible too. SD was short a number of guys on the O-line, yet handled Blo's front four like they were backups.