Most of the people who actively play Hunt are actually veterans, so you saying most players won't stick to the game after a month of two is absolutely wrong.
I have over 4000 hours in this game. I played the first beta available and was a big part of the discord community back then (I was the pope of the Church of the Derringer). Back in beta many things were actually better, and most people who played since then actually agree.
So the main point of your post does hold true to some extent: the game just doesn't seem to get better over time. They add some content here and there, but so many of the main issues we had back then are still issues the game has right now.