Yeah. Pretty shameful to blame the artist, when the main problem with this game has clearly not been art... Somehow Dev has been unable to code an RPGM game to even slightly work over 4 years... Further, as others pointed out, the content itself dropped off in quality. I don't expect a lot, but I imagine with even a bit of effort it can't be that hard to push a not absolutely broken update.
Sometimes people just lose passion... But the right thing to do is pause the patreon, or switch to per-update, and if not that at least don't lie and manipulate while blaming others. Disappointing.
The excuse is stupid anyways, because if they had everything done and are just waiting half a year on the artist, what were they doing in the mean time? Is the whole game finished and bug free, just waiting for art assets? Yeah, right.