I stopped playing the German cruisers when I had an appalling game.
First I get my engine knocked out. I just get it back when I get it knocked out again, along with the rudder.
I hit "Repair" to get them back, but less than 15 seconds later the rudder gets knocked out again.
My Konigsberg gets sunk shortly after.
After reading on the forum that the Admiral Hipper is fragile I don't think I'll bother.