I honestly think that Kuzmanovic is one of the worst ever.
- Quaresma & A.Mancini were terrible, but at least after Mourinho realized how bad they were, Mou reverted back to the tried & tested diamond midfield, and thus limited their playing time.
- Rivas was actually OK. A lot of brainfarts, but some solid performances too. Basically a poorer version of Burdisso.
- Schelotto was only here for awhile and was hardly used.
- Heck even Gresko was actually pretty damn solid, only to be completely undone by the horror of 5 May 02.
But Kuzmanovic, not only is this guy absolutely horrible, he was also constantly used by Mazzarri PLUS look at the damage he's doing...Taider will probably leave the club because of a lack of playing time and Kovacic could have suffered a similar fate too. He may not be the worst player ever per se, but probably have done/will do the most damage to the club.