A project going for longer than 5 years is a sign of success. It's only when a project stops being developed or when a project's development slows down that questions should be raised. We can look at examples such as GTA 6 being developed for 10 years, the whole Harry Potter series 17 years, One Piece for 25+ years. These projects can afford to be developed for so long because they're successful, otherwise they would move on to something different. Considering HH has about as much words as the first 4/7 Harry Potter books combined, I'd say I'm making wonderful progress, and in about 1/4th the time. (4 and a half years). After all, more money, after a certain point, doesn't mean a project gets done faster. Likewise it doesn't mean the Harry Potter sequels will be better than the original, it's just a sign of success or hype.
Harem Hotel is an Odyssey, unlike Harry Potter but similar to One Piece. It has an ending point in mind, or a direction, but it does not have everything between the beginning and end planned. We have story beats we want to hit of course. Another comparison could be Jazz. Jazz music heavily relies on improvisation and goes on as long as the composer wants it to. Being able to play Jazz is a testament to the composers skill because they're able to seamlessly continue playing music for hours if they wanted to while staying on rhythm and maintaining harmony in a live setting.
Unfortunately it's very common for things to get heated on F95, even extremely mundane things.