La Liga has gone through three matches since the season started, the three favorite teams who usually always compete for the title have achieved different results, Real Madrid managed to get full points after getting three consecutive wins, Barcelona was only able to get 2 wins and 1 draw, while Atletico Madrid was only able to collect 2 points from 2 draws and 1 loss. However, Real Madrid is not guaranteed to win the trophy because their success at the end of the season depends on their performance while the competition is still running.
At this stage of the league, that's almost irrelevant. Last year, Madrid also started ahead of Barcelona, and it wasn't until well into the second half of the league that Barcelona managed to take the lead. So I think that until at least the 20th match or so, we won't be able to speculate with any certainty about how things will turn out.