How could this have happened?

How the hell did Angel get sent home instead of Sam? No offence or anything but Angel has so much more potential compared to Sam. She's also been in the bottom two twice and this was Angel's first time. Sam was obviously doing something wrong. She's one of those people where you either love or hate. And she has the weirdest nasally voice which I wasn't fond of from the start. I am still in shock. Angel had an amazing voice.