2008 Ducati S4RS dry clutch either sticks or doesn't disengage when I pull the clutch in riding, and sometimes I can't get the bike out of gear unless I stalling the motor while in gear.

It is a dry clutch on your bike, no oil on the clutch plates only clutch dust. That year Ducati is also a Tricolore, so they only made that model with clutch plates are "Dry". It may be a bad clutch master slave or the clutch master is sucking air into the system.

Check to ensure the hydraulic mechanism is working properly and hasn't leaked. If it has leaked or there is air in the system, it wont allow the clutch to disengage properly and would be akin to a clutch cable being out of adjustment or broken. If the yydraulic release is working as it should be, you may have oil fouled clutch plates. Oil fouled plates would cause the bike to jump/lurch from a stop and could also stick together.