It makes absolutely no sense to me why any Giants fans would be upset they drafted Saquon Barkley with their #2 overall pick. The Giants decided to bring Eli back, they were never gonna take a QB with the #2 pick. The appropriate argument would be, why did they bring Eli back? Drafting a potential "generational player" is NEVER a "bad decision" IMO. Get future QB when you're ready to move on from Eli.
The Giants will most likely have a high draft pick next year to draft a QB to pair with Barkley, OBJ, and Shepherd.