noun

the negative aspect of something otherwise regarded as good or desirable.

he says being a rock star is a fun line of work when you’re young, but admits fame can have its downsides

snag,drawback,disadvantage,stumbling block,catch,pitfall,fly in the ointment,handicap,limitation,trouble,difficulty,problem,complication,liability,nuisance,hindrance,obstacle,impediment,weak spot/point,weakness,flaw,defect,fault,disbenefit,minus,flip side,hiccup,spanner in the works,monkey wrench in the works