After three weeks and the San Francisco 49ers are 3-0! It wasn't the prettiest game, but the 49ers found a way to survive five turnovers and win the game.The 49ers looked very good on offense the entire game...except when they turned the ball over. Jimmy Garoppolo played through a game saw him deal with pressure for much of the game and showed why he is a franchise quarterback.While there were some hiccups, overall, the defense is doing its thing. Despite the number of turnovers, the Steelers only converted them into six points.Since Kyle Shanahan arrived, the 49ers have endured tremendous frustration and adversity in close losses and injuries. It never phased them. Instead, the 49ers learned how to fight through difficult situations and it has paid off. They do not panic. They never stop believing. They keep fighting and know they can overcome mistakes and adverse circumstances.That is a sign of a team that has turned the corner as it probably does not win this game last year or the year before.