I guess, that's what we need publishers for. To kick developpers asses to make finished product and return the invested money.
Except most of these are amateur devs just doing it in their spare time on top of full time jobs and families.
If I was to make a game it would get updated once every 3 or 4 months and that's being generous with my free time. I'm a chef that works silly hours and spend my days off with my girlfriend so the only time I could work on it is when i'm home alone. That's why I never bothered though, I like gaming in my down time and would have to stop which would bore me eventually.
Other people have similar constraints on their time and this is just a hobby for them. The biggest issue is how people view Patreon. They seem to think they are paying for a finished product but they aren't. Patreon is nothing more than a tip jar to support the creators. Most developers expect people that pledge to adult games to be, well, an adult and be able to manage their own finances.
Publishers deal with the AAA industry which ends up with far more abandoned games than you realise. Publishers also put a lot of pressure on devs which is why we end up with a lot of unfinished and buggy releases like Anthem. Publishers are also responsible for loot boxes, day 1 DLC, disk locked DLC and games being chopped up to be sold as DLC to make extra money.
P.S. Moderators, it's been 3 months, this needs the abandoned tag.