Honestly, I have never encountered any of these issues. Or heard about a single person having this many issues.
Obviously, I cannot make any guarantees as to the quality of the production setup for you, since you been having a lot of issues with the setup that is unfamiliar to me. Especially the GUI freeze.
I even gave the demo a try locally just now, and it works just fine for me. Both locally on my desktop, and on a lower-powered setup I have at home.
We have even done scale-testing of this previously, with tens of thousands of devices, and still no GUI freeze.
If you are to receive any fruitful feedback from us on these issues you are having you need to provide the information that is needed in order for us to reproduce this, otherwise there is no way we can help you with this.
That is information on machine, OS, commands you’ve run. Logs, statistics and observations, etc.