10 Worst Things Nick Fury Has Ever Done
5. Made A Fleet Of Helicarriers - Captain America: The Winter Soldier
Proactively making a fleet of flying death machines sounds bad, regardless of context, so it's a wonder how Fury thought Cap was going to respond when he showed him the helicarrier fleet being made by S.H.I.E.L.D.
While you can absolutely see his line of reasoning for going through with this plan, and to be fair, having a fleet of helicarriers would have absolutely made dealing with Thanos quite a bit easier, it's clear the minute you see Cap's face in reaction to the fleet of ships that this is the wrong way to go.
Besides the obvious reason of this being exactly what HYDRA wants Fury to do - letting his fear get the better of him and giving HYDRA the means of taking out everyone who will pose a threat to their plans now or in the future - this is clearly Fury letting his paranoia get the better of him when, at the time, there was no reason to take such insanely drastic measures.
Despite his best efforts, Fury became the architect for the destruction of S.H.I.E.L.D. by going through with this plan.