Devs that can't keep up with their own promises and workloads:
Alorth (He spent 8 months for 1 scene. he basically said he's more committed to other works than his own till he finishes those he's contractually obligated to help or something idk. Edit: He also has another game called tales of eros I think? Just checked, and that hasn't been updated in 11 months.)
Glacerose(Idek what the fuck they're doing anymore, they've abandoned one project and reset the other 3 or 4 times now)
JYP (Seriously, 2 months to publish 1 scene-- not to mention they already abandoned one project, and they went and completely restarted their current project which is 1 scene at the rate of months, literally.)
Sir Damned (Let's be real here, all he did was try and have the abandoned tag removed because as long as people still think there's hope for this game, it'll also bring traction to radiant)
Irphaeus (He literally just lies about all his updates, and makes excuses for 2 months stalling the release of the update after he says he's gonna drop the update.)
Icstor (Personally never played his game, heard nothing but awful stuff about his commitment as a dev though.)
Any others?