The "small screen" the article is talking about that was still functional is likely a backup PFD, or at the VERY LEAST an attitude indicator. Validating that an attitude indicator is working is not particularly hard, especially if the flight controls are still working.
Ejecting over a populated area at a low altitude is a dangerous decision in its own right, and the unfortunate truth here is that if the choice is between "the life of the pilot" and "the lives of people on the ground" then the pilot is obligated to fly the jet until a crash is assured. Obviously I don't have all the details, but the article itself doesn't say that required instruments were unavailable.
Part of the issue here, too, is that pilots and aviation in general is an "old boys club" and this extends to giving long-tenured pilots extraordinary leeway for mistakes they made that newer or less popular people would have been crucified for. I was left wondering if that's what the first two flight reviews did, and the third one didn't.