By Tanner Garrity The following is an incomplete list of prominent CEOs who have stepped down in 2022: Amazon: Dave ClarkAmerican Airlines: Doug ParkerDocusign: Dan SpringerJupiter Fund Management: Andrew FormicaKickstarter: Aziz HasanPinterest: Ben SilbermannRealReal: Julie WainwrightSouthwest Airlines: Gary KellyStarbucks: Kevin JohnsonUnder Armour: Patrick FriskIf you choose to dip back just a few months into 2021, that list adds some heavy star power, too — Amazon’s Jeff Bezos, Disney’s Bob Iger and Twitter’s Jack Dorsey all left their posts last year. What’s driving these departures? Acco…