Betis is rarely to lose, the match might end in draw since it hosted in Real Betis's home. The other teams can only score 1-2 goals to Real Betis, nothing more, so Betis has a strong defensive strategy.
I'm sure Madrid will win against Real Betis later, especially since Madrid's performance this season is much better than last season, in fact Madrid has only lost once so far.
We need to being objective to judge the performance of every team, not influenced by the popularity of the team. Actually Betis should able to beat Real Madrid, but they're just not lucky enough and only scored one goal from six big chances.
Both Madrid and Barcelona will always dominating La Liga, but it doesn't mean they would never lose or draw against other teams.
In fact, it is impossible for Betis to hold Real Madrid to a draw, but this is football, even though they are playing at home, but unfortunately luck is not on Betis' side, but on both sides, so this match ended in a draw, both clubs both performed well. Real Madrid played attacking precisely in the 66th minute. Real Madrid actually missed out with Aitor Ruibal's goal with a shot that I really think is a deadly goal...
This season's La Liga, it's not just Real Madrid and Barcelona who are dominating the League this season, but you forgot about Girona, who is still a candidate for champions this season, just look at Barcelona's match tonight with Girona, in my opinion Girona will win the match to be at the top La Liga standings...