Klopps hands are tight as he has to work out with limited options and the new defenders he bought are not as good as those who are injured like Dijk and so. It really spoils the run when your key players are out for a long term. Right now scoring has also become their problems. The list of troubles just went on growing and growing after Dijk injuries. It is hard for Klopp as well.
I know it's pretty difficult for Liverpool and Klopp atm, they have a couple of injury issues, but surely that's not excuse enough for this sort of performance in the EPL, despite their injury crisis, they still have more quality players than teams like West Ham and Leicester city that are above them in the table. It's difficult to win the league when your key players are out, but to be out of the CL spots and even looking set to lose a Europa league spot is terrible, and they can't hold on to the excuse of injuries any longer.
There are many who are saying Klopp must go (in twitter and so) but I don't think he has done something wrong over these past few months. Its just that things are not falling into the way they want.
It's his job to fix things going wrongly at the club, Klopp was given quite a lot of time before he delivered a bit of success to Liverpool, so I don't think Liverpool will thus be in a haste to do away with him atm, I'm pretty sure he'll be given more time to bring the team back to their previous form.