In my unasked-for opinion, he should absolutely give up on this project, and take a salaried job that'll let him support his family and not have to deal with the entitlement issues and lack of perspective the community evidently has. If half of what's in this post is true, he's shown admirable restraint: I'd have burned it all down the first time someone got pissy about a free thing I gave them.
The open source community can be wild sometimes. Back when I was still maintainer and lead dev for Gaim (not Pidgin), I would occasionally get downright hateful people e-mailing me for not implementing whatever feature they thought needed to be implemented, or not getting it implemented quickly enough. One guy managed to get ahold of my cell phone number somehow and called me at 4am to discuss "his ideas" with me for…
He keeps it incognito because the vitriol his alias receives from impassioned members of the community makes him afraid of getting doxxed. He showed me some of them. I don't blame him.