If Derby won that playoff game against Villa, it might have been Villa who are put in administration instead of Derby. Both teams were heavily overspending the past few seasons. The entire Championship is a lottery to see which team gets promoted to the Premier League before it is too late.
So basically Mansfield are the League 2 version of Ipswich Town this season. High spenders with expectations of promotion but with an extremely rubbish defense causing their team to be shite.