A planned economy will always, always get worse. All historical examples show us that.
But you are free to give us an example of a planned economy that worked properly and brought freedom and prosperity to their citizens. Just one single example will suffice.
P.S. I see the downvotes, but I don't see a single example. Just one...
I'm curious. What is an example of any economy that has only worked properly and brought freedom and prosperity to their citizens and has never ever gotten worse?
What are your stats measuring good and bad and therefore what do you count as worse? Would it be better all have a home, job, access to education, food?