Never ever give money to someone for an unfinished product
Thats how you fix it, the patreon model is horrible extremely anti consumer and rewards laziness, none of this comes as a surprise, at best youd have to be very responsible and stop supporting devs that dont work, but you know most other patrons wont do that, and the devs always have an excuse dont they oh my aunt died, oh Im depressed, oh my dog ate my code, oh Im getting ready to put the game on Steam, its easier to just stay subscribed isnt it rather than unsubscribing then subcribing again when they do good, yeah they know that and they count on it, you are trapped buddy, in a terrible system designed to suck your money.
If I had a game with a big patreon Id be even worse with updates
Suckers