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.
Why do you know that Barcelona is not able to compete with the current squad and with their new coach, even though the matches and the League have not started and pre-season has not yet taken place, then on what basis can you predict this while the players who are in the current Barcelona squad This is much more sufficient and in my opinion the evidence from last season was much more sufficient.
Finishing in second place already indicates that Barcelona is able to compete at the top, but that doesn't mean that next season Barcelona won't be able to compete at the top, even though Barcelona is hampered by financial problems, that doesn't mean they will slump next season.
Barcelona finished the season in second position. Okay, but Barcelona couldn't really compete with Real Madrid. That is why Barcelona finished second in the points table as the other teams in the league did not perform well at all. If you look at the point difference between Real Madrid and Barcelona last season, you will get the answer to your questions about how consistent Real Madrid was last season and how far behind Real Madrid even though Barcelona finished second.
When I first saw club football, the first league for me was La Liga and I knew Real Madrid and Barcelona as teams, but there is a big difference between Barcelona then and Barcelona today. How Barcelona will return to the previous position is now a big question.