Fujitora is the main reason Doflamingo got captured. If Fujitora helped Doflamingo to capture Luffy and Law, they would lose.
Doflamingo blamed Fujitora, not Luffy, not Law, not anyone else.
Even when Mihawk was Shichibukai , Doflamingo was called most dangerous one.
Who knows, that's the point of being nerfed, what we know that Red Dog with a massive DF match-up advantage didn't even fight Prime Ace, Ace was massively nerfed.
The huge magma clash vs. Ace, it didn't even badly hurt nerfed Ace's hand or didn't even immobilized him and didn't even ragdoll him despite DF disadvantage, and that was nerfed Ace. Without Luffy needed to be saved, even with a massive DF advantage, it wouldn't be easy as Ace is too fast that he can move faster than Red Dog when he was nerfed and didn't get any significant damage in a direct 1 v 1 big clash.