Sadly, performance has been deteriorating for well over two years: it had fallen substantially before I joined.
That said, I am far from happy, not least because many of the things we need to do to recover performance will take time to implement. We have a very old, very tired railway that is used intensively.
I suspect if changing the leader of the organisation would solve the problems, I would be long gone!
It is much more complex than that. We have comprehensive plans, but I share your frustration, tempered only by the knowledge that we are doing everything we possibly can.