Maybe you dont know Real Madrid is an underdog team when they face a team like PSG. It was crystal clear that PSG will win Real Madrid. Funny enough I was expecting more goals but the referee quickly ended the match without adding any extra time to avoid further humiliations to Real Madrid.
You are right. PSG is the favorite team in this match because PSG is the champion of UCL. UCL is the highest level of club football competition, winning it proves that PSG the strongest one now. Well, adding more extra time doesn't mean for a more goal of PSG only. Who knows Real Madrid can score a goal. I think this isn't a big deal because it is clear PSG winning the match already.
First it was Raúl Asencio who lost position, leading to the first goal and the Rudiger turnover gave Dembele the second goal. After then I stopped watching the game because there is nothing Real Madrid could do again to win.
I admit Real Madrid still has weak defense. Both Rudiger and Asencio got difficulty stopping PSG attackers. But it is not only about the quality of the players, Xabi also chooses the wrong tactics and the wrong players in the midfield line. I actually expected Xabi will put Camavinga-Valverde-Bellingham in the midfield line. Unfortunately, Xabi put Valverde as the right back and prefers Tchouaméni as a defensive midfielder. Also, he put Gonzalo García as an attacking midfielder. TBH, it is very strange tactic applied by Xabi Alonso.

By the way, it is the right decision to stop watching the match. As long as Xabi applied improper tactics, there is no way that Real Madrid can do against a strong team like PSG.