Aside from player debates -
A lot of fans get far too caught up with trade rumors, scouting reports and analyses from sites like DraftExpress, mock drafts, youtube highlight videos and interviews, and even opinions from other fans. For those who watch a lot of college or international ball, these things may not factor in quite as much.
The explosion of social media and all the nonsense that accompanies this, I think, really amounts to preconceived expectations of what a GM "should" do with draft picks and trade scenarios, despite the fact that the majority of it is speculation, and that much of it is just flat out false. When these expectations are not met, fans become sorely disappointed and call the draft a failure. It's very easy to set yourself up for disappointment in this fashion.
Much of the time, the actual deal that goes down has no long-standing rumors attached to it before hand. Correct me if I'm wrong, but I don't recall any rumors between Orlando and OKC until it was actually about to happen. Same with Thad Young and Indiana.
Anyhow, main thing is to stay objective. Just because draft day didn't go according to plan by some peoples estimations, it doesn't mean that the trade doors are closed. Free agency is also right around the corner.