Only one team wins the SuperBowl each year
Only 12 teams make the playoffs (37.5% of the teams)
For years and years under Shula the Dolphins made the playoffs but would get eliminated before the SuperBowl. Then, after Shula it was hit or miss for a few years, then miss for the last 5.
I've come realize that it was all good under Shula. You're among the best teams....so you're not the one team that wins it all. When you play hard and never quit, its satisfying to acheive something good. And keep driving to get better and hopefully get to the big one and win it...