Because you said next coach needs to win ll to be on Xavi's level or a worth replacement but next season it will be against ham + Mbappe so if last season was already overachievment it will be impossible next season 🤔
Of course. To be on Xavi's level in one of the most important areas, the next manager will have to provide a very high points season in La Liga. And I mean very very high. In the 90-95 points range. This is to match some of Xavi's best work in his time here: very high league consistency over an entire domestic season against smaller sides compared to Barcelona. This summarizes Xavi's best work at the club.
The next guy doesn't have to necessarily win the league title, because Madrid could be capable of providing the same consistency as Barcelona, and beat us twice in h2h games. There were (rare) situations in big leagues where one team got the title, but the 2nd finished on 93-95 points. It wouldn't be fair to expect an inferior Barcelona to outmatch a full-firing Madrid with Mbappe in their attack. Xavi did not face such a domestic force, a la Pep's City.
I don't expect the next manager to provide a 90+ points season. But he can do it. Winning league titles vs a much higher-rated rival is never easy. It is achievable with hard work if you are a good manager (see Leverkusen).
Also, I don't dispute that the next manager might fail domestically to match Xavi's first season but still improve the team in other aspects. Maybe the team will perform better in CL vs higher-level teams. This is no doubt an area where Xavi failed to produce notable results.
There are many areas where a team could improve, while you could also lose some things in other areas. Xavi made many of these youngsters Champions of Spain for the first time in their careers. That's not something to belittle.
However the next manager might or might not do, there are still going to be many of the same problems. Lack of funds, injuries to young players, having to compete vs richer teams compared to us, and so on. These aren't situations that appear now all of a sudden. So it's not like "Poor next guy, he is gonna get so much worse than Xavi". These are problems that Xavi himself had to deal with in his time at the club. They contributed a great deal to the pressure that got the best of him in the end.
Having to compete at the top and keep winning (or at least competing until the end) titles with all those challenges is anything but easy. Especially in such demanding clubs like Barcelona (with a predisposition for delusion and a penchant for over-romanticizing I might add) that refuse to accept that the club is simply not the same it was 5-10 years ago.