I have over 150 item sets from the previous system, and now I have to delete all of them manually.

Literally have to click on the three dots, wait a half-second, click delete, go to the middle of the screen and click "YES", wait another second or so for the set to delete, then repeat. Over 150 times. I looked in the files and you can't edit item sets in there anymore, I'm guessing they're online now or something, so this is the only option. Fuck. Me.