As of last season Real Betis was better compared to this season where they played 3 games without a win 2 draws with a single loss. I think they need to get back to that form they were and going against Leganes is still going to be a difficult game for the home side after struggling with Madrid without a goal I think they (Betis) might get a chance of winning this game. The ball is in their court so they need to make the fans happy tonight or else it will be a back to back loss, I'll go for a home win no matter how down the home team is on the table, 2-0 to Betis to win against Leganes.
This week they will face Leganes, which is a team that has been promoted in La Liga. This is an opportunity for them to be able to achieve their first victory this season, especially since they will play as hosts. One of their current problems is that they are not very productive in creating goals, as proven by the fact that they have only created 1 goal in the 3 matches they have played.
They must be able to evaluate their front line, because that is one of the things they must have well if they want to get a victory. Even though they cannot concede, if they cannot create goals, then that will not allow them to get a victory.
Many people criticized this action of Barcelona and Barcelona started a new season with this criticism. But at the start of the season, Barcelona have been playing the right tactics and are in the right positions so far. If everything goes well then the fans will consider this decision of Barcelona as correct but if for some reason the result goes against and Barcelona has a bad result compared to last season then the management and manager will be criticized by action based media and football lovers.
Indeed, with bad financial issues, Flick has been able to do better than Madrid to date. But this condition could change. The season will be long. There will be a lot of matches. Barcelona will still have many challenges to prove they can compete in financial limitations. Indeed, this condition is much different from Madrid which has abundant funds and many new star players. But this condition is not in accordance with expectations until now. Maybe they will even have difficulties because many players are injured.
At least for now they can still give an answer that they can perform well with all the problems they have. Even if we remember when Barcelona decided to replace Xavi Hernandez, they also received a lot of criticism because Xavi was considered still very worthy to be in Barcelona, but with the existing conflict they preferred to have Hansi Flick.
You are right, even though at the beginning they can perform well, it does not mean they will be able to maintain their performance completely, the season is still very long and something could happen that makes them finally decline a little. I do not expect them to decline, but the opportunity is still there for all teams, including Barcelona.