Xavi may have left a solid legacy at Barcelona but even without all that, I think Hansi Flick will be able to achieve success with Barcelona as long as he has full support from the boss. Hansi Flick is a good coach, and I think Barcelona was very fortunate to be able to sign him to replace Xavi. The only problem that might be the biggest obstacle for Hansi Flick is Barcelona's financial condition which might prevent him from being free to recruit the players he wants.
Yes, Barcelona was very lucky when they managed to get Flick, he is a figure who previously had quite a brilliant reputation. Financial problems are of course an obstacle for him to be able to get new players in the transfer market. However, the current squad is also quite competitive and Flick must be able to manage it well and not completely change the scheme inherent in the Blaugrana, namely tika-taka. Flick must also be able to get support from fans so that it is easy for him to compete with Real Madrid.
Barcelona will compete with other clubs in the league, but my concern is that they will not be able to challenge Real Madrid with their current squad. However, since Xavi is no longer the coach, I believe the new coach will do their best to make Barcelona successful and win the title, allowing them to buy quality players. Let's see Flick's performance next season if he can turn Barcelona to be successful and make the supporters happy, because even the fans don't think they'll do well next season since they don't have key players in the club now if not Yamal and Pedri, that I think they are young and can help Barcelona very well in the feature. but the rest are old and I don't think if they didn't get new players he will definitely be affecting the club performance losing matches and trophies in the competition if they didn't solve the issues.
Barcelona will play every team next season, but it goes without saying that they won't be able to compete very well.
After Real Madrid I would definitely say Atlético Madrid and Girona as teams Barcelona are least likely to do well against. Real Madrid is one of the strongest teams in the league and since Real Madrid's team is very different from the team that Barcelona has built, it is already understood that this season will not be a tough competition between Real Madrid and Barcelona. It's definitely a sad news for the Barcelona fans as they won't be able to compete with their arch-rivals Real Madrid. As in other seasons there was a lot of excitement about the El Clasico, maybe next season there will not be so much excitement about the match between Real Madrid and Barcelona.