He said he wanted the job, he said he was ready for the job
Yeah, and the board basically shrugged and said "you can try, but we won't give you any authority". It's like someone coming up to you and saying he's a good racing driver and you going "fine, but you'll have to do it without a car".
Don't get me wrong, getting someone else in was absolutely the right decision but the point is, we still don't know whether he'd be a good manager on a full time basis because as a caretaker with no power to decide players' future you're set up to fail. He should never have been given more than two or three games.