Yeah, this is the thing everyone always forgets about crowdfunding platforms like Patreon and Kickstarter.
You aren't buying a product. Generally speaking, the person you're supporting has no real legal or moral obligation to provide you with anything (unless they explicitly promise specific rewards, which is why most legal action taken against Kickstarter has been over people promising physical rewards and not delivering).
Most crowdfunding services are just angel investing, but with the only payoff being the possibility of a product eventually being released. Services like Patreon are even worse, because they're literally just "I will offer financial support to an artist I enjoy in the hope that it may eventually encourage them to produce more work."
It can definitely be frustrating if you support someone via Patreon and they do absolutely nothing in exchange, but that's pretty much on you, and there really isn't much you can do other than stop supporting that person. But if you're not even supporting them, and are mostly just complaining about other people supporting them, then you really don't have grounds to complain at all. And they certainly don't owe you anything either way.
Yes, it can suck if you see a game you think looks great and the developer just sort of stops updating it, whether because they're abandoning it for whatever reason, or because they've realized they can milk indefinitely and get paid for doing absolutely nothing. But that's always been the danger of early-access indie development (and like it or not, far more games will be started and abandoned than will ever be finished).
