Because being a solo developer is stressful and goodwill is completely free, and yea, I get that you're upset that your monetary investment has not gone as planned, counter argument is....what the fuck did you think was gonna happen? you know full teams of people have made games, built reputation and have gone completely off the radar only to drop 1 scene after a year and 50 glitches. Like genuinely, did you see A porn game you liked and just splashed out? no common sense or pre-planning at all? The fact you paid at all with the idea that the game would just immediately work with completion when it was in a fully beta state is inconceivable, some triple A games released at full price, were met with complete backlash and bugs, and then they just let it rot, you don't think people give up on their projects because someone just complains everyday while they struggle? see Mr Trunks over there, he is a patron and has direct connection to Vanny themselves, they provide help, insight and care and thus are paid back with previews and evidence that their money is going towards development. YOU clearly paid, sat there, didn't get what you wanted when you (should) know the gamble in Patreon backings then just cry when people are happy. NOW IF, you continue to be depressed over your own choices, I'd recommend taking it up with Vanny Dev themselves, see what they personally can do for you as a once backer, because I'd like this to be a safe place for Vanny themselves to release information.
TL: DR, talk to Vanny personally, keep the negativity to yourself, it's not that hard.