I think we will bounce back, but this will be a recurrent theme of the season if Flick doesn't change something. Even in Pep days at our peak, we didn't run like crazy for 90 mins every week engaging in end to end affairs. We would score the goals, and then proceed to mainly keep the ball at our leisure letting the opponent exhaust themselves by trying to chase it. We knew how to use our ball retaining skills to our advantage as also a defensive and energy saving tactic. We're losing this threat in our game for sure.
I get the squad problems, hell... I've been saying it for years myself, but there is also something lacking in terms of overall approach to mitigate the squad issues.
For example, is the team even physically able to cope with the intensity Flick expects for over 50 games a season? And if not, what is his plan to counter the run of games where intensity drops? Just come in the press room and say we played badly? How does that impact things beyond a superficial level? There are many questions he needs to provide an answer for.
Sure, if we'd have a great squad and you see Kounde, Cubarsi and Pedri for example have a drop in form putting up an stinker, you move them on the bench and let the other top players prove themselves. They are expecting exactly that, their chance to take over. Buf if the squad is short and you are low on options, the manager has to come up with the solutions.