15. Lionel Messi
Messi became the most famous soccer player on the planet after he lit up the world with Barcelona. He became bigger than the club and had more influence than most of their executives. He forced the team president to quit because he wasn’t happy with the direction they were going.

It appeared as though Barcelona averted a crisis and prevented Messi from departing. But he quit the club for PSG in 2021 and left his teammates high and dry. They had a terrible start to the year before consolidating under the leadership of Xavi (via GOAL).