There is something you can do as a manager. You can drop them.
However, I agree that this is something that's difficult to do when you basically sat on your hands in the summer and throughout January instead of buying high quality replacements.
Replacements can do fuck all if your tactics are worse than a paraplegic! Our football is an image of the manager- clueless.
Arsene Wenger, the only football manager that got paid 8 million quid to do nothing but sit on his arse..