I think, it was a surprised victory to many people, because the first half performance showed that Liverpool has a good performance than Real Madrid that made many people to concluded that Liverpool will defeat Real Madrid but the game later changed for the favour of Real Madrid. Liverpool defenders allowed Real Madrid strikers to embraced one goal that brought them victory at the end of the match. Real Madrid used their opportunity well compared to Liverpool strikers that missed so many opportunities in both the first half and the second half.
The only thing I think surprised most people is the fact that Liverpool couldn't register a goal after all their numerous goal attempts, Liverpool performed well in both half having almost 8 shots on goal but Real Madrid keeper Courtois saved all the good shots that would have resulted to goals, Madrid defenders did a great job too because they were fast and accurate in clearing balls coming towards there goal post. And Madrid played more with experience having scored a goal that was ruled as offside by VAR in the first half, they still fired another strike that lead to the only goal by Vinicous Junior, Madrid was tactically better than Liverpool.