I've worked with the media over many years and met a number of radio and tv presenters. Some have huge egos but virtually all of them are:
a) Ambitious
b) Competitive
When I first heard Mike McCarthy on Radio Sheffield he struck me as someone who wanted to make a name for himself by asking probing questions. Maybe he has set his sights on a future job with Radio 5 Live, or TV, and is trying to make his mark. Or maybe he wants to be the next 'John Motson'. Whatever the reason, he got off on the wrong foot with Wilder.
I've never met MM; maybe he needed putting in his place, or maybe it's time for CW to give him some respect.