This may be based on dissatisfaction with the selection made because Bayern were too hasty to appoint Kompany as coach when there were still several other options that could be considered.
The main reason is yes, because from Tuchel to Kompany. And based on Kompany's experience as a coach, he has never managed a big club before, so many doubt his ability. What Kompany needs to do is to prove, by winning every match of Bayern Munich in Bundesliga, at least, that's it.
Bayern Munich can not relaxed because there are tough opponents in the Bundesliga, talking of Bayer Leverkusen, Borrusia Dortmund and many others.
Actually still early to judge the performance of Kompany with Bayern Munich. At least, we need to see 3 matches again, more watching match between Bayern Munich and the top clubs. Let's see how they will be going to again in the next match.