What he's saying is true, but there's a fine line here between support and accepting rubbish being served up. The crowd get frustrated because the performance is not good and at times more patience should be shown. But equally we don't want to become a happy clap support who will tolerate any old rubbish. If you do that, and allow expectations to fall through the floor, then you will never improve.
In our current position, we need to be patient and supportive during the matches, because Goodison is the only thing we have going in our favour. If we do that, then the players have no excuses. But that doesn't mean we should not continue to hold the club to high standards. And if they serve up a woeful performance then let the players know your frustrations at full time by all means. The fans would never be on the players back if they showed more pride in their performances and stopped buckling under pressure.