I sympathize with OP.
I think there are a lot of people who bought the game thinking it was 85%-90% finished, then discovered that it was more like 60-70% finished. And they would not have bought the game if they knew that beforehand.
That is the problem with Early Access. If the game company only tells consumers that the game is unfinished, but don't CLEARLY disclose how unfinished it is, then it can lead to this result.
It is not enough to just put a EA disclaimer. A 25% finished EA game is far more risky than a 50% finished game, and a 90% finished EA game is not very risky at all. People have the right to know exactly what kind of EA they are getting into before they buy the game.
Otherwise, what is to prevent companies from abusing the EA system? They can put out a 10% finished game, slap a EA sticker on it, and advertise it as 90% finished. And then, when people complain, just say "We told you the game was unfinished, it is in EA!"