I don't necessarily disagree with any of that. You're certainly right that a number of aggravating factors have been beyond his control. But I don't think it gets him off the hook. He was hired, like all coaches, to win. And here we are 2.5 years in and our team still just isn't very good. We fans can (and do) have long discussions about exactly why that is. But diagnosing a problem doesn't fix it. And it's his job to fix it.
As I've been saying, it's a foregone conclusion that he's going to get another year. Glass' announcement all but ensures that (and he probably would've gotten another year even if Glass weren't retiring). I don't think he should, if we miss the tourney again. But reasonable people can differ on that. I think it's absurd that we'd retain a coach that misses the tourney for 3 consecutive years -- whatever the explanations and excuses. But other people apparently don't think so.
That's no surprise to me, BTW. It's among the reasons we're stuck in a rut of mediocrity. Few among us seem to expect, much less demand, much in the way of success anymore. That goes for way too many boosters and fans as well as the IU brass.
All that said, like you I'm hoping we start seeing significant improvement and all this becomes moot. I'd love nothing more than for the team to start shutting its critics up. But I'm not optimistic -- and I hate saying that.