Does one bad play lose the game?

Nice topic. I have always thought kickers and quarterbacks get more praise than they deserve for wins and more blame than they deserve for losses most of the time. Would you say that if a guy was 25 of 30 with two TDs "lost" the game because of one pick returned for a TD? But people do. Or a guy who is money on FGs all game, but he "lost" the game because he missed a 38-yarder you think he should have made? You should be scoring touchdowns, not field goals anyhow. Same thing goes for officiating. If you have legitimately sucky calls throughout a whole game, that's one thing, but one questionable call and you think that made all the difference? You shouldn't be in the spot that one call can make such a difference. Play the game. It's 60 minutes, four quarters, two halves. It's not one fourth-and-one play at the goal line.