The right hates him for accepting a job, and performing it. The left hates him for not coming to the conclusion they wanted him to come to. Now the right will continue to badger him over why he investigated Trump in the first place, and the left will badger him over why they didn't get their way in the end. The only way he wins is to stay home, and never enter the public eye again. Enjoy his retirement, and never speak to the press again.