We can't compare Xavi Hernandez to Hansi Flick because they're both different and possessing likely similarities. Barcelona will bounce back to formidable form, all they need is enough time to heal from the severe critical injuries that have hits the club and also affected them so badly. Barcelona president, Joan Laporta will always push for excellent results and we know his next plan for the club.
Xavi did his best and it’s unfortunate that his services are no longer needed despite winning them a league title during his stay at the club. Xavi is a good coach but also every good coach needs good players as well and to currently Madrid has better players than them and until they can keep up with the quality of players i don’t think it will be easy to win the title ahead of Madrid.
Each coach has their own character and of course the way they train is different, for example in terms of strategy or tactics, but both of them are quite great, whether it's Xavi or Hansi Flisk, both of them definitely want to do the best for Barcelona, but we will see Hansi Flick's debut next season and indeed We cannot deny that the financial crisis experienced by Barcelona also forced Hansi Flick not to spend on players because he was more focused on educating young players so they could play in the main squad.
We also know how Madrid's current strength is after the arrival of Mbappe in their main squad, it is clear that it will make it difficult for Barcelona to compete for the Laliga trophy next season, however, Hansi Flick doesn't want to give up before competing, I also believe that Barcelona is still a difficult team. for Madrid and will remain rivals who will compete for the La Liga trophy next season.