It can be summed up easily: Most of the teachers left years ago due to a toxic work environment and all of the content went stale making it not live up to competitors.

I remember reading a number of articles by / about the founder Ryan Carson similar to this one, about not taking unnecessary investment: https://medium.com/@ryancarson/not-silicon-valleys-timeline-...

I imagine part of the problem is many of these coding schools are scams. It isn't that people can't learn from them, but what they are teaching is usually just too narrow to be all that useful.