You're not wrong, the title is definitely between Barcelona and Real Madrid. Athletico Madrid are just lucky to win this fixture and they had the home advantage that why things ended in their favor but they are not in good shape to win the title at all.
Atletico Madrid might only last for a while but not too long as the way real Madrid and Barcelona will be, however concerning this weekend happening on the real Madrid match was like something they said should happen to some of the big teams because almost all the big teams we thought would win loss, if we go to outside Spanish league a lot of big team also did not win and even Arsenal almost lost if not for there 84 minutes respond and now Barcelona is also suffering for lack of penetration against Real Sociedad if not for this good substitution Barcelona did by bringing Lami Yamal who just entered and Barcelona scored another.