No not all Klopp's fault, a lot is on the players and of course the horrendous luck we've had with injuries, but ultimately Klopp sets the tactics and selects the players and he's been making some big mistakes recently. For example despite our injuries our team should still be far too strong for Brighton, they should have at least the same energy and work rate and should definitely have more skill and inventive tactics but we don't.
In relation to selecting the players it can get difficult for any manager and being honest I can't really call Klopp on his team selections.
I'll tell you why.
When the manager gives a format on how individuals should play (( with your depleted squad )) he will tell a player to do the following.
Example, man mark joe bloggs and don't let him out of your site and keep up with the pace. Now if that player is Usian Bolt it simply isn't happening. Bit like telling Gomez to take the role of VVD, it's impossible to fill such is the gaping hole on player quality.
So in reality here's how I see it. Your under performing not because of Klopps tactics but more a case he hasn't got the tools to play with such the debt of your injury list.