Urf doesn't work.

Not anymore, at least. Urf has entered into a vicious cycle in which people go in with expectations of getting to play something bonkers, get into a game where the enemy team gets 3 or more champions that feel like utter garbage to play against, suffer for a good 10 to 15 minutes, and then the game ends. If that didn't happen, chances are they were on the team that got the 3 or more awful to play against champions, leading to a boring stomp where nobody had fun because one team wasn't challenged at all, while the other faced too great of a challenge to stay invested.

Then after they think about these bad games, they start to think about why they weren't allowed to pick what they play. At least if they had a choice, they could fight fire with fire. But that leads to the next problem. If people have a choice in what they pick, they'll always pick the same broken garbage every game because that's what wins. This necessitates the randomizer.

Urf is broken on a fundamental level. It only works when choice is allowed, but without the choice to play the same thing every game. I suggest this; Remove the champion the player just won a game with from their selection pool for the next 5 games. This gives a buffer that stops the mode from being centralized around broken picks every game while still allowing choice (the most important thing to have)