Oh I agree, it would be nice to receive a little heads up before committing to a scorched earth action.
At least to the Patreons who supported with their wallets. It is possible the dev's been in a very bad place mentally and just reacted in an extreme way. So many good games have gone down the Abandoned route. I still miss Reluctant Archon which was another promising title but relegated to the scrapheap
Still, life and family will always come first.
While, yes It would be nice to leave a final brief update to confirm they have quit developing that game and bring closure for fans still hoping it will be resurrected one day, who knows the state the guy was in at the time or what happened.
For people feeling mad about it, if the dev was in a very bad place with mental health then the game and it's supporters were no doubt very low in his considerations, if at all. Anyone who has ever had serious mental heath issues or knows someone that has them, knows that acting logically or conscientiously is rarely an option. The walls can literally feel like they are closing in. So while I can sympathize with supporters, I can't condemn the guy without knowing what has happened.
At least he isn't still taking money on Patreon and staying silent...like at least one dev I know of.