It's pretty simple.
1. Fire Pioli and the entire coaching staff, replacing them with any GM/coach who never had anything to do with the cursed tree.
2. Re-sign Bowe and Albert.
3. Sign another WR, a safety, a backup QB, a backup RB, and a RE.
4. Draft a franchise QB #1 and BPA across the board.
5. Lower prices of parking/seats to restore Arrowhead Magic. Boom.