If anyone "deserves" to hold a grudge against the 2017 Houston Astros, it's former New York Yankees manager Joe Girardi. The Yankees were up 3-2 on the Astros in the 2017 ALCS before Houston won the final two games at home and ended the New York's season.
It also marked the end of Girardi's tenure in New York. After being within one game of the World Series, Girardi was replaced by Aaron Boone following the season. A lesser man might blame his bitter end on the Astros' sign stealing scandal, but Girardi is above that.
Appearing as a guest on an episode of Foul Territory, Girardi expressed his take on the 2017 Astros' sign stealing fiasco, and it was a refreshing and admirable stance.