why is bob so bad this year
It's just the way things have shaped up this season.
Instead of the team defense and Bob coexisting in harmony, going into games knowing exactly what you're getting from both sides, he's trying to be the superstar goalie while the defense cross their fingers.
As a result, some nights Bob is good but the chances are too good against, some nights Bob is bad because he's trying to do too much even when he doesn't have to. In other words, every night feels like a battle to keep the puck out.
It's tough to suddenly change that. It takes a lot of hard work, commitment and success to achieve that calming trust between the team and the goalie. Wait until next year when they'll come into the season with a mindset of "we have to cut down on chances against, we have to better defensively, we have the offense in this room so we're not worried about scoring just have to make things easier on Bob".
But for now, Panthers score 3.5 goals per game so you just enjoy the rollercoaster ride.