Atletico Madrid are not too rich like Real Madrid and Barcelona but remember that in the last two decades, they are the only club that won La Liga title and they won two titles with Diego Simeone. It's very impressive if we know that last two decades are dominating years of Barcelona and Real Madrid with Messi and Ronaldo.
In this season, Atletico Madrid have very good performances and now they have very good rank, that opens their good chance of competing La Liga title. Athletic Bilbao will have to accept their fourth position as they are not good and experienced enough to win La Liga title. To win it, they must win not only Atletico Madrid but also two other strong competitors Real Madrid and Barcelona, it's impossible.
I think Atheletic Bibao performances last season is better than what they are playing this season, the Williams brothers has not been consistent in their games has they did last season, so drastically it affected the whole team. No one expect Atheletic Bibao to Challenge for the title because they have no reliable squad to win the Laliga. For the records it's has been Real Madrid, Barcelona and Atletico Madrid Challenge for the title.
This season the title contenders still remain the three big club in Laliga, Atheletic Bibao is just an average team targeting for champions league spot and for the past years they have been maintaining the four spot on the league table. Even their fans are not pressuring them for the title the champions league spot is a big achievement for the club.
Real Madrid and Barcelona are favourite for the title, both team has the qualities to win the title every season. Real Madrid has to improve in their league performance, losing to Real betis at home was a set back for them and they have to bounce back this weekend and win Palma away. Any slide mistake again Barcelona will win the title, Barcelona will be playing Rayo away this weekend too, its an easy game for them this weekend.