"I got a fun one. You know how on shark tank they always introduce Kevin O’Leary as having made his fortune selling an educational games company? He single-handedly killed the learning games industry (those Carmen san Diego type games that were real popular in the early 00’s) by forcing the devs to churn them out faster and cheaper at the cost of quality, slowly killing the market, and he also nearly bankrupted Mattel when they acquired his company."
#21 Microsoft bought out Skype, it's loaded with Windows 10. Now they have Teams and are killing Skype for Business to force businesses and schools to use Teams. Skype Personal will still be available for a while.