It definitely sucks, but it's part of the game. In my last season, I won 98 games, but lost out on the playoffs because I was in a division with a 103 game winner. The other division winners were all 6-8 games behind me.
This season, I won 104 and won my division. The team that finished 11 games behind me had the same record as the team that won the other division by 6 games. Since it was a 12-team league, the team behind me gets to watch the playoffs.
Ace said it best, "Sh!t Happens." (Everyone remembers the 103-game winning SF Giants in 1993 that got to watch the playoffs from home.)