ARURF is an example of why two things that are fun individually are bad together

I don't think there's anyone that can disagree that URF can be a fun gamemode, or that ARAM can be a fun gamemode. They might not be for everyone, but as a whole neither strikes me as having a terribly unfun experience for a majority of the players. In URF normal everyone can pick a champion that is strong in the game mode, and while the game mode itself leans towards the crazy, there are a LOT of good picks and there are still bans. You might not win, but the only reason you would be stuck in your base unable to play your champion is if YOU picked that champion and it was bad. You might lose, but you can still play the game.

Aram is a little less consistent, but with trades and randoms you can always have a champion that at least does something, the game lasts long enough that you can hit item strides, and things like warmogs can make the weaker melee tanks have far more longevity against pokes.

But mixing AR and URF together has made for the least fun experience in League for me to date. There are a huge range of champions you can get stuck with that don't do anything in URF, and because of that you can get completely shut out of even playing the game, having to sit at turrets and get killed under them or sit in the fountain and never do anything, games can be so one sided that only one team gets to have fun, and I'm not talking about winning, I am talking about some of the oppressive champions that you used to be able to ban out just taking over the game completely and killing everyone.

If the argument is that URF is unfun because everyone plays the same champions over and over again, the problem is URF itself not the method of champion selection, because there are only so many champions that can be played in that game mode. The answer isn't forcing someone to play singed into an all ranged URF squad with brand and Jayce on the enemy team. That's NOT a solution.