Answering the OP, I do think some supporters believe Saints should be able to breeze through the opposition as if they weren't there. Sadly, there will always be people who simply won't stand for the pace of improvement in a football side, at whatever pace it takes place. They seem to forget that there is another football team on the field doing their utmost to undo everything their own side is trying to do. If we have a rare off day, you can bet it wasn't because the players decided to take it easy. Do that, and playing stats get you left out of the side. There is no hiding place these days. No, it was because the opposition were well drilled and informed as to our intentions and played well to stop us. In all of this, it is simply impossible to be perfect; to make the storybook pass or shot - the one that is remembered for years - all the time. Even Messi isn't capable of that. All you can ask for is that a player gives his all, and plays as well as he can, for as long as he can, in a match. If you can see that, then there's little to complain about.
I suppose some supporters will believe that by paying for their ticket, they can act as they please. I think they're wrong.