Yes we were there for 6 years. But your statement implies that Wilder was the literal only possible manager who could have won promotion from L1, which is simply not the case.
Let's not forget that without Ched Evans being a colossally stupid twat one night, Danny Wilson would have almost certainly got us out of L1 at the first time of asking. We were unbeaten in 9 games ahead of the MK Dons match, and Evans had scored 12 goals in that time. Then we lost him due to non-footballing matters that Wilson had no control over, and we picked up 2 points from our last 3 games, and missed out on promotion by 3 points. There's certainly an argument to make that Wilson could have set the team up to be less reliant on Ched than it was, but it's hard to be anything but sympathetic (in my opinion) to Wilson's predicament of having the key component of his tactical setup be taken away from him at the absolute worst moment in the season.