Real Madrid are the most stable team and I think next season will be no different. In addition, Barcelona are also likely to lose a few players, who they will have to sell because they are in financial trouble and could use every euro. In principle it is almost certain that Frenkie de Jong will leave there, someone of his caliber cannot easily be caught in midfield. And then you need time to put it down again. I think another easy title for Real Madrid.
In football, the squad in the team may not give you the title but it is the performance of the players and the teamwork they showcase that will determine if a team will win the trophy. Real Madrid has a good number of players no doubt but other teams like Barcelona, Seville, and ATM are also getting good players so that they can compete for the title next season. Barca has some financial issues but selling some players doesn't mean they can not have a good team again I believe they still have some quality players that will perform very well next season .