The Miami Marlins, then known as the Florida Marlins, had their inaugural season as a franchise in 1993 as part of a two-team MLB expansion effort that also included the Colorado Rockies. Over the past 27 years, the Marlins have lost over 300 more games than they have won, and have produced only seven winning seasons. They also have had multiple stretches in which they have been considered one of the worst franchises in baseball, even to the point of frustrating fans and others around baseball with how they have conducted business.
Yet, I feel one could argue the majority of teams in baseball would trade their own franchise history for the Marlins track record since 1993.