Curious as to why you don't agree with not expecting a finished game when signing up as a patron. This sort of system is by no means new, and unless stated somewhere that an alpha/beta is available it's on the supporter to read the membership descriptions to know what to expect. It clearly states on the Patreon tiers
"Access to alpha version. (in preparing)" which isn't exactly the best English but it still easily translates to "Access to the alpha (which is still being prepared)". One should know before spending money that they're only funding the developer and won't get much other than the demo fight we've all played until it's ready.
Sure it's taken a long time since the last build release and I completely understand how some people may think "ahhh he's gonna do a runner with our money", which shows why there is value in regular releases (as it proves the project is still being worked on) but as far as I understand NumericGazer is building the game that exists outside of the battles as well as new battles, and depending on how he's approaching this it could mean it's totally unplayable until a lot of things are finished. I'm no expert but I'd assume if a playable build could have been released by now it would have been. But hey that's just my two cents on the matter!