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.
If workers only made unfinished parts and products and complained that consumers don’t appreciate it enough, then that would be a serious problem. This dev is complaining that people badger him on how to improve and finish his game while still selling it as Early Access on Steam.