I think the fact that a lot of the fans only started supporting them about 20 years ago, when they were winning the league, think they should do every year.
They have no idea.
Not every Arsenal fan thinks they deserve to win every year.
Not every Arsenal fan thinks that 4th place is a great place to be.
I've supported them since the late 60's, and I am a season ticket holder.
I've had to endure the years where nothing was won, and am grateful when something is, I certainly don't think it is our right.
We didn't deserve to get in to the top 4 this year, and I'm kinda glad we didn't as it may have prompted Arsene to spend some dollar.
Edit: not exactly sure what the OP was on about, as it just shows the years we have won the top division.
What does this prove ?
It only proves that at certain times, we have been the best team in the top division over a season.
Not many teams can boast too much about that.