Real Sociedad relied on their defense, but against an attack like Real's, it is very difficult to do. After the goal conceded, it was difficult to change strategy, although they had enough time, but they could not do anything, so Real gets an important victory. Ancelotti made a small rotation for this match, but this did not help Sociedad either, although they had several good attacks, Real's defense played this match perfectly.
Real Madrid had the opportunity to score more than one goal but they weren't luck enough, because many chances was wasted. Real Sociedad tried their best but when playing with a club stronger than you, your best wouldn't be good enough to defeat your opponents. Endrick only goal was able to make the difference between both sides.
Real Madrid wasted many chances, but the most important thing is that they should win the match, which they managed to do. However, Real Sociedad also tried their best; even though they are not as strong as Real Madrid, they had some opportunities that they would have turned into goals, but I think luck wasn’t on their side.
Although you are right, we can’t see their performances and what they have done because we already know that Real Madrid is the favourite in the match, and our focus is already on Real Madrid to win. If not, if you look at how the match went, Real Sociedad also tried.