Making URF random was the least fun decision possible
At least in normal URF, you could choose to play a champion who's good. In ARURF, every game is random and it's up to RNG who gets the cancer on their team, and if you don't well you have to sit through 30 minutes of getting killed by Fiora doing 2300 true damage in half a second while you play one of the heroes Riot hasn't given any cc yet.
Seriously playing URF was one of the few fun things left about this game, and even after every new and reworked champ getting 2 years worth of CC for some reason you let the ones without CC get picked in urf. There's no bans either, nothing, it's a complete dice roll. Either you accept that you're going to get rolled and have a miserable 20 minutes, or you dodge and hope you get some of the OP champs after a 15 minute queue.