Did Bayern return to mediocrity when Van Gaal left? When Heycnkes left? When Guardiola left?
We still been relevant, despite some setbacks under Kovac and now under Nagelsmann. Flick won us the treble, but managers in Bayern don't tend to last very long because of the constant turmoil inside the club.
My point is, having a manager like Klopp for so many years and SAF too for that matter is fantastic but it also means you're in deep shit when you have to replace them down the line. They became institutions and the face of the club.
United never recovered from it (lets see if Ten Hag can change that), and something tells me Liverpool will be in for a very difficult time as well.
I don't know how competent the Liverpool board is, but if it's like United then they're in for some grim times.
Anyway, I do get your point. There's some uncertainties around the club right now. Be it with Nagelsmann, Kahn and Brazzo. To me is it more the fact we lost Uli and KHR as board members that might make us irrelevant like 2002-2009 again. Kahn and Brazzo seems levels below them in the way of handling the club.