He behaved like a spoilt manchild who hadn't got his way for the last 3-6 months.
I didn't mind that he appeared to lose his edge because I imagine that Management can be a lonely place and in the end you're all alone with the ramifications. The right thing would've been to share how he truly felt and stuck his notice in, but forfeiting that amount of money with a resignation vs. getting a sacking payoff was clearly too much to wilfully give up on. So he created a game of 'sack me if you dare' which sounds like he ended up losing.
With the benefit of hindsight, we all saw how Warnock was money first/affinity second. The way he used the media to leverage contract negotiations (e.g. Portsmouth job & week before Wigan game) means he tainted his own legacy a bit, but it doesn't take away all the success we had with him.
I feel pretty much the same about Wilder* as I do about Warnock.
*Except Wilder wasn't as much of a bent b*****d