Ecchi Sensei stalled for like a year or two before the devs officially announced that the VN was cannedI'm no game dev or nothing... but most mf on this forum complain about update scedules or development duration no matter the game. But this one seems somewhat justified.
The issue seems to be that he flip-flops between commissioning and working on the game.
Cummystudio spent years trying to milk patreon munny big time by making multiple cummy games before admitting that they bited more that what they could chew... so rather that finishing the games even if it was one by one, they canned them to start MORE GAMES
The issue is that not only the devs go radio silent, they actively let patreon cash as much money from people donating before quietly abandoning the projects and it has been like this for years.