It's true that the season has just begun, so it's quite natural to see the performance of the big teams has declined a bit... just look at how Barcelona at the beginning of this season was quite difficult to get more points, they were even held to a draw by Rayo, and also Atletico Madrid who is currently in a pretty bad condition, slumped to the bottom of the rankings due to not winning a single match.
These big teams are clearly having trouble organizing their game, but that doesn’t mean this will be the final picture of the season, usually big clubs have the capacity to bounce back and find their rhythm as the competition progresses. So I see these big teams coming back to the top once they get their game together.
I don't know, but as far as I know, performing well at the start of the season does not guarantee that a team will win the championship. The trophy belongs to the team that consistently improves its performance, not only at the start of the season, but throughout the season. However, on the other hand, when a team performs poorly at the start of the season, it gives a bad impression to its fans, making them doubt that the team they support can compete this season, especially when it comes to Atlético Madrid, who have performed poorly in their first three La Liga matches and have only managed to secure 2 points.
I completely agree with you. Because the first match can never determine the outcome of the entire season. Those who are consistent will probably win. I can give you a real example of this. Argentina started very badly in the last World Cup. Many people made very bad comments about Argentina. But Argentina played very well in their subsequent matches and they won every match and took the trophy. So we can never determine who will win by watching one match. One match can be bad, so there is no guarantee that they will do badly in every match.