I'm old enough to just barely remember Mears, but not any of the specifics about how bad his losses were. Were they Witchita State bad? I have no idea.
I just think in general it's impossible to evaluate coaches from that era in the same way that we evaluate them in the modern era -- ie, by putting about 95 percent of the weight on the postseason. Having only 22-25 teams in the tournament back then made it an entirely different animal. Getting in, who you met early, everything.
Up until last year, Pearl's NCAA performance had been decidedly underwhelming too, considering how good his teams were supposed to be. If Mears had coached in an era when 64 teams got in the tourney every year, he would have been in the NCAAs almost every year too, and surely he would have had a deep run or two of his own. He had good teams every single year, yet only got to play in the tournament three times.