I disagree. The time to judge the product is before they sell it to me. In most cases, there is no refund if I buy the game to judge it and don't like it. I will judge it before I spend my hard-earned money. That means with what I see. Or a Free demo if any.
Or you watch videos of other people playing it. It's possible to judge a finished product without spending money, and it's unreasonable to say 'Your unfinished product does not stand up to what I expect a finished BG3 game to be'
But are you not judging the product before it is finished by saying you like it? You may not like it when it is finished. So your reasoning is flawed.
I'm saying it's going in a direction I like. I'm well aware it may end up being a game I don't like, but that does not seem likely.
The difference is that most the people hating it are claiming things that can, by all rights, change before release. Like the UI or assets being 'too much like DOS2' without knowing placeholder assets are a thing.