Look, even at high level it's not that difficult, controls are soggy not firm
but hey they still work.
Straight and Level Two as I taught it for years = Power plus Attitude plus Trim = Trimmed Performance.
Never mind complicating the issue by programming in benign failure, all the crew needed to do, even if the autopilot dumped the problem in their laps, was fly the S&L attitude and leave the ****ing power where it was.
That they weren't trained to do so, or that Airbus/AF encouraged a mindset that the software will save you, is the real problem.