The public sector has a whole layer of complexity that doesn't exist at all (edit: as much) in the private sector, and I can promise you it frequently does NOT feel good at all.
It is difficult to explain but people tend to use the word "bureaucracy" as a catch-all for several dozen discrete problems that crop up in different combinations depending on what level of govt you're operating.
Typical examples might be :
-a developer not having the authority to work on a system
-a developer being ordered to work on a system, but not being given permissions to the necessary tools (even if they're available), or they may prohibit certain common-sense tools, or they may force you to use certain tools.
-a developer being ordered to work on a system where the design is severely irrational, maybe impossible, and but he or she has no authority within the hierarchy to push back on requirements
-a developer being ordered to work on a system that some powerful person wants to see fail
Imagine the "client from hell" that many of us have dealt with before, who doesn't know what they want. Now imagine that person is like 3 levels higher than you, calling the shots, and you're not even allowed to speak to them, much less push back against their crazy expectations.