demotivatingde‧mo‧ti‧vat‧ing /diːˈməʊtəveɪtɪŋ $ -ˈmoʊ-/ adjective 
making someone less eager or willing to do their job: 
Tasks that do not challenge you can be very demotivating.—demotivate verb [transitive]
making someone less eager or willing to do their job: Tasks that do not challenge you can be very demotivating.—demotivate verb [transitive]