burnout
noun[C/U]
us/ˈbɜrnˌɑʊt/thestateof having noenergyorenthusiasmbecause ofworkingtoo hard, or someone whoshowstheeffectsof thisstate:
[U]We havefoundthere is much more burnout andsicknessamong those who don't gethelp.
[C]Thedrummerwalkedinlookinglike arockandrollburnout.