Personally I dont think the tournament is rigged, but it's insane that a refree is always to the rescue whenever RM or Barca are in trouble, happend since 2009
It's not rigged, but there is obvious pressure from all sides to help Real and Barca. The media is to blame as well. They always portray Barca as fair and the saviours of football, while in reality they're a bunch of cheating sons of bitches. Busquets against Inter comes to mind.
But I believe much of that is in the past. Barcelona experienced quite a lot of backlash after the game against PSG. Far from everyone was convinced by their comeback and while in the past this would have been a Barca masturbating fest, much attention went to the glaring mistakes from the ref. If anything similar would happen tonight, I am almost sure that would hurt both the UEFA and Barcelona financially.