This really does not sound healthy. The game is released, for a certain amount of money. If people don’t like what they get for their money, they simply should not buy it.
But by now gamers have been so trained to expect to endless content treadmills and all their ilk like mtx and battle passes that publishers/developers get egged on if they don’t work on their game 24/7 and forever.
Manor Lords is early access. At least one patch is to be expected. And of course the publisher is absolutely right. If my memory serves me well one dev developed the game all on his own so far and the challenge of meeting expectations after being a massive success is huge. Hiring more people to get developments going is likely necessary but expanding takes time. Some players have unrealistic expectations in general but even more so when it comes to small indie productions.