We were building a website using angular 1. We were collaborating with some devs from outside our firm. At some point one of the devs(which was supposed to be a front end expert) had the brilliant idea to migrate to a never version of angular. He made the changes and fucked up all the controllers and functionalities and then he just disappeared. My team worked for 2 weeks to fix his mess.
Dude do you even know the definition of refactoring? 😤