I hate how we just accept that. You can't release half a game and patch it into being good with dlc. If any other developer did that we would be up in arms.
Firaxis did it. Three times. Civ III to Civ IV, Civ IV to Civ V, and Civ V to Civ VI.
Maxis did it. The Sim II to The Sims III.
Any game that has buttloads of DLC or Expansions, or even only a few, is going to feel less than its previous title. That's just how it is and always has been with games like CK2 and the ones above, plus plenty more. It's a well-documented phenomena in the video game industry. Shockingly people are playing Civ VI now much more than they were at release. Why? Because it's gotten expansions and now has as much to offer as its previous title.
Who says the game they are giving you is half a game anyways? And who cares if it IS when it isn't a $70 title? CK2 was what? $40 at release? This stuff takes time and money to make, they can't give you a CK3 similar to a CK2 with
eight years of additional support and labour. Do they give you a $40 game? That's what you should ask. And if the answer is no? Who cares? Just vote with your wallet. Either wait for a sale to justify it to yourself or just don't buy it at all.
Plenty of games operate this way, you
can release a game and make it good with DLC. That's the world we live in and it has a much longer precedent that isn't the same as the obviously negative current slew of exploitative and greedy microtransaction full-price shovelware we see with the likes of Fallout 76, Star Wars: Battlefront 2 by EA, and other garbage that what Paradox is doing shouldn't be compared to. You're getting a $40 game with the promise of long term support and content focus on that price point not whether or not it holds up to a completely unfair comparison with a game that has eight years of post-release support.