It seems like you forgot one thing, do you still remember how Bayern Munich performed under Tuchel? In terms of quality, he is much more experienced than Kompany and has won several prestigious titles with different clubs, but his presence in the Bayern Munich coaching chair actually made the club fail to maintain its dominance in the Bundesliga. I know Kompany was the fourth choice, Bayern Munich appointed him as the head coach because the other three candidates were not willing to fill the void left by Tuchel. At least for now the management's decision has proven to be right, now Bayern Munich is on the right track, I really look forward to another surprise that Kompany will show with Bayern Munich.
Tuchel did a great job when he was managing Bayern Munich and exactly he added more experience than Kompany, Kompany is just starting and he has not gone far like that so there is a lot for them to consider before comparing the both of them, in football, you can not always have it your way and the moment you notice that thing are going the other way round then you should quite so that you don't spoil the record that you have already built beautifully, .just imagine that pep now after setting a good record for Manchester City and end up bring back the club in term of performance, how do you think people will feel and even pep I think that he might want to just retire after Manchester which will be good for him. Bayern Munich knew what they saw in Kompany and now is doing very well, but I don't think that the response is going to be the same with that of Tuchel.
Even if people were not happy about kompanys appointment the man is doing everything possible to make people accept him and there is a lot to do when it comes, to his addressing the issue, and at least Bayern Munich is the one topping right now, and is taking up his responsibility seriously.