So your solution is to mark the game complete and we get zero updates and no new content... It's as simple as if you like the game play the game, if you don't move on. If you want and can support then support, if you don't or can't financially support then play the game and talk in thread about the game.
Most titles I really enjoy I don't want rushed to an ending, and this story is somewhat unique in that her life and the twists and turns it takes has no real end in sight but the ride remains fun.
So I will not be pissed of while I am enjoying the title and if people can and want to support I won't be pissed of at them either. If and when I eventually get bored I may leave but having a negative emotional response to people enjoying something they like makes know sense at all.
You didn't answer the question mate. if they moved to an update every year, would you call that a scam?
My solution is to unsubscribe until they get their asses off the couch and work on the game. They're making 10k a month, you think they're gonna quit if the subscribers drop? I would say don't subscribe to the patreon under any circumstances, they already have more than enough to live a comfortable life. They will not use the additional money to improve the development of the game, it'll just go to their disposable income and further disincentivize working on the game.
This game is nearly nine years old and its not even half way done. 0.01% of games are actively in development for this long and not even halfway done. what are even on about with the rushed ending? There will literally be no ending at all, ever.
It makes perfect sense if you're directly contributing to the deterioration of a product I like. It's like a gacha game introducing a new whale mechanic and cutting content, and its player base rewards the game for it. Being pissed at the player base for rewarding scummy business practices is perfectly justifiable.