No.
The Boltons have hated the Starks for generations, since the Starks first pushed them from power in the North centuries before the arrival of the Targaryens. Roose saw a chance to seize power when Robb lost the support of the Karstarks by beheading their lord and the Frey's by breaking his marriage contract.
Every battle Robb won he did on merit, outmaneuvering his opponents time and again. One direwolf does not win a battle for you, let alone three battles.