Note that Fort was the responsibility of the scouting department that was canned following the 2014 season. Same with Wilson in 2011. Anthony, Kikaha, and Tull were all picked in that void where the fired staff had done all of the scouting up until January 20, 2015 and Ireland's crew came on shortly before the draft.

None worked out, but I wouldn't call them drafting blunders.

blun·der
/ˈbləndər/

a stupid or careless mistake.
"she stopped, finally aware of the terrible blunder she had made"

I gave the two times that the Vikings were late turning in their pick cards as examples. Those would be classified as blunders. Having a pick not be a success isn't a blunder. It happens to 2/3rd's of all picks to some degree according to the chart you shared that I had posted. It is the nature of the draft. It is simply a bad pick based upon any number of factors.