Explain exactly WHICH core-concept is broken?
Yes, it has crashes at savegames, yes there could be interface improvements, yes, the AI could be better at performing some issues, yes, there could be performance boosts.
At first, for me things are broken if they didn't work as they should. And should in form of as I think they should. broken doesn't nececarrily mean that is broken beyhond possible repair, simply because this is a piece of Software
And because i see broken in this way (other may call it issues of find whichever word suits them best) all the points you mentioned above are broken in my view.
I dont want to state everything which doesnt work as intended (supply, ai, diplomacy, trading, OOBs, Map, combat-ai, Naval bombers not finding a invading transportfleet, performance, savegame corruption etc) in all detail since it is already written down in several threads. (But of course will do so if you want it

)
So my overall point is: Not everyone here necessarily means the same when speaking about 'issues', 'broken' etc.
And of course people are feeling pissed if they buy a game and feel like they are beta testers. Well i tried to participate during beta, but wasn't chosen. Now i payed to be betatester. To be honest, im not really happy about it. So far i didn't even know that this is some kind of 'standard' for Paradox releases. My first Paradox Game was HOI2

oomsday, that worked finde from the start, installed it, patched it, no major issues. (Major issues are things which annoy me like a totally random AI, and a strange threat system which has no place for opportunistic behaviour and which even promote outright suicidal behaviour

)
So far this is the first Thread i see a direct reply to the problems outside of the Patch Thread. I appreciate that.