I do feel senior management set tone and culture, but sometimes a long time toxic culture spills down many levels.. and I think most people would agree that the culture for staff has been toxic in various ways for a long time - probably from even before the grounding of the fleet.
I recent left a toxic environment after a near 20 year employment - and unfortunately it wasn't just the top - indeed they brought in a new CEO from outside, and some others, and while some of the Senior Maagement Team left for one reason or another, it didn't resolve many things, and indeed some string pulling politics players still hung around in the shadows and got other toxic people in to the point where it was untenable for some.
A certain sort of corporate culture can enable middle management and the like to become entrenched and to have like minded people come in so even if the top changes, it may not filter down fully to the ranks.
OTOH, often in my experience of multiple workplaces, often the front liners and people at the lower rungs of an organisation - such as the tech types keeping the cough going, the nameless back room people with no voice are often good people who are stifled from above, and just need that ray to come through from above to actually be really able to make a difference.
I'd bet you anything there are folks within IT who see ALL the messes and have ideas or even proposals for projects to fix, upgrade, enhance (no, the original meaning
) and so on but haven't been enabled. Not saying it will happen anytime soon but I suppose hope springs eternal.
I just fear that such a deeply entrenched corporate culture won't change quickly even with deckchair shuffling at the top.
Still, I am a half glass full guy, so I'm going to hope that change may happen.. not overnigh.. but maybe over the next few years. Time, as always, will tell....