It is a vicious circle as someone has already posted. Poor performance on the pitch at home breeds negativity in the stands. I sit in the RRE and before that the Chaddy. Over the course of the last couple of seasons you could feel the negativity and frustration growing. Now in my current seat, the positivity dwindles after about half an hour which leads to some sat around me having a pop at the players in front of them. This then translates to the game, you can see players panicking on the ball or trying desperately not to try taking a risk or trying something creative because they don't want to incur the roth of those behind/ to the side of them or they are scared of ballsing up. It's like a nervous tension.
I agree that things need to improve on the pitch in order to draw the fans back to any level of enthusiasm, but I also feel that if there was a bit more positivity/ energy for the players to feed off, it could give them that extra bit of something. We see this when we are away. The energy of constant singing/ chanting lifts the players to do something.
We basically need to batter a team or two in order to get the crowd and the players going or we need a player or two that aren't afraid to try something risky rather than playing safe football all the time. Something has to give at some point.