Hacking doesn't make a lot of sense. Why would the hackers close the Patreon? They don't get anything if it is closed. And if they were really hackers, they would change the devs Discord avatar to some weird profile picture, like a drunk chicken or something, not just delete it. Do they just hate AOA Academy the game, in particular, and want to erase it and the dev's presence from the Earth?
This seems pretty far down the list of possibilities.
Every time someone does something crazy, all the neighbors, classmates, or coworkers all say, "It was so unlike him." Everything you can think of is "unlike" a person, until they do it.
I still think cracking under the self-imposed pressure is the most likely explanation. Followed in probability by some family member horrified at his spicy hobby and him closing everything down as penance.