Enmity hurts the hater more than the hated.
Let us be very clear about two things: Austin Jackson should not suck. He has prospect pedigree. He has been a very productive player in the major leagues. He slugged .479 in 2012 at 25 years old. He is 28 and in his last year before free agency. He has every incentive professionally and personally to excel and secure himself a financial windfall that could last his family generations.
Secondly, Austin Jackson has sucked as a Mariner. SO much. You can argue, not totally irrationally, that his performance after his acquisition was THE reason the team missed the playoffs by 1 game.