What VAR does for SUFC

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VAR was supposed to be this black or white system that would take the game forward. It's the biggest pile of shit ever to enter the game. How many years in is VAR? It seems to get worse every season.

Was it not supposed to bring in consistency as well? If so what happened to Casemiro's ( Man U) 2nd yellow card today. I suppose the var can't advise a booking but can advise a straight red.
The whole var business is bonkers