Not sure on records, Christian Gross comes to mind as being the worse Premiership manager.
Graeme Souness
I would say either Steve Wigley, as he managed a whopping 1, count them, 1 win whilst in charge.
Rafa Benitez
If anyone says gary megson they should be shot. He kept bolton up a few times.
I would say either Steve Wigley, as he managed a whopping 1, count them, 1 win whilst in charge.
Or Egil Olsen for simply having all the tactical ability and managerial skills of spongebob squarepants.