SPY vs ROC - Azir ult fails 2x

I think it was around 23min into game they were fighting in mid lane. Nisqy azir had ult and COULD have disengaged for his team to save tahm and others and keep them much healthier, but he didn't. Then he could have gone a bit sooner and walled the other team in the baron pit and gotten off some nice dps to make the fight there more even, but he didn't. And then he got ryze ulted after roc grabbed baron and he basically wasted his ult. Why????? Stop looking for the shurima shuffle all the time and just use your ult - save your teammates; it's not always about getting a kill with ult; saving teammates and giving your team a chance to reset and contest objectives is just as powerful.[zombie-brand-facepalm]