Falcon Heavy Delays as a Burndown Chart

These is the least useless burndown chart I've ever seen, making it still useless.

I wonder how much of the delay was caused by cascading delays as a result of crappy scheduling. If you need X to complete Y and Y¹, scheduling gets pushed back for Z, Z¹... Zₙ.

Is there some benefit, some management strategy that involves operating in crisis mode indefinitely? How does management continue to be over-optimistic several times without doing the introspection to see that they're not making good estimates?

Everyday Astronaut has a good video explaining the reasons behind the Falcon Heavy delay:

https://www.youtube.com/watch?v=FOdoNQXQYv8

It was largely down to the design and requirements evolving over the years. Because the Falcon 9 itself improved and dramatically increased it's payload capacity, it became able to itself fulfil many of the missions that the Heavy was originally intended for.

The Falcon Heavy that flew yesterday was quite different to the one that was originally planned.

This is the highest-bandwidth exposition of FH I've seen.

I don’t know, but I know some people you could ask.

Can someone explain this chart? I simply cannot understand it.