Barcelona were more at the middle, not too good performance but also not bad for a team with young players who are still in the beginning of building their carrier except for Lewandowski who already knows more about the game. Barcelona players needs a lot of game time to be able to understand the game better, this coming season might be something different to watch. Last season there was no competition for the La Liga, checking the points difference between Madrid and Barcelona is too wide, which makes Barcelona performance look poor.
Next season, Real Madrid will also have a more fierce and fierce squad, so this will also prevent Barcelona from challenging for the title in La Liga again. Even though the facts you say don't rule out the possibility that Barcelona will be much better than this season. Because apart from there being still many young players in Barcelona, the team will also be trained by a new coach who may have new methods that will be implemented in the Barcelona squad later.
The depth of Real Madrid's squad makes it increasingly pressured for Barcelona and makes it difficult for them to compete for the title, the only reason that strengthens my opinion is because Barcelona has still not been able to recover its financial condition. Hansi Flick will try to make Barcelona perform optimally and take advantage of every match by winning, but the increasingly competitive level of competition will make it difficult for Flick to bring Barcelona beyond the strength of Real Madrid.
Hansi Flick has started making improvements to the Barcelona squad, he has asked management to bring in several players he wants, but Barcelona is very limited in making moves in the transfer market due to its unstable financial condition. There are several players who have to be sacrificed to make a certain amount of money to realize Flick wish, this is the path Barcelona must take to realize their desire to become the leading team again in the title race.