When was the last time you flew raw data in command with pax on board ?
How is the fact he was on raw data have any relevance to the fact he made three illegal approaches and busted minima three times?
the 550m you speak of is that touch down, mid point, or stop end ?
As a professional pilot, you should be well aware what the answer to this one is.
Now, once we've all finished castigating the captain for doing what he did, and he shall rightly take his share of the blame, let us ask as pertinently why a presumably sane crew made such appalling decisions. It doesn't happen in isolation so I hope the investigation fully investigates the companies and commercial pressures involved. I'm not holding my breath though.