I mean, CK is an entirely different game, with vastly more experience in the finer political aspects and developing games. Paradox has done numerous titles, and even Paradox has released some really poor games at launch. HOI4 Has had numerous problems, some that made the game unplayable initially. And on top of that Modders have added full Tech Trees and Political Focuses for the entire world, and HOI4 players complain that "Modders are finishing the game for paradox" so some people genuinely just like to berate games as a hobby.
That's kind of like comparing a typical Steak House, to a AAA Michelin Chef's Steak house. Both can be good, but one is arguably way more experienced in it.
I've been plenty critical of game aspects, but given that the Devs themselves haven't really given reason to be critical of them, there's not a reason to bash on the company itself. It's not like we're dealing with EA levels of Richardry where the entire point of the company is to bleed your wallet.
There's definitely still time for the game to improve, but tons of people enjoy it as it is now. Perhaps your nostalgia made the expectations for the game unrealistic, compared to what the design team is actually capable.
Which is more a problem on your end, not theirs. A Lot of people here have been disappointed by the game, but comparing it to warband, it's a huge improvement, Graphically, Engine wise, Economy wise, theres a lot more intricate depth. It's admittedly missing many features too, but there's still time for them to be added in before EA ends, and Devs like Mexxxico have proven they are willing and ready to listen to community feedback, even if we aren't getting massive amounts of Dev feedback as some people demand.
The feedback from the various devs across the forums is tenfold to that of most AAA game companies, Great examples being anything EA related, such as Battlefield, The Sims, or Ubisoft with Assassin's Creed and Skull and Bones --- A Pirate game that was announced to be released in 2018, and has been delayed numerous times with 0 reason to why, or if the project is even continuing.