Game has, or had, an agitation banner on the start screen. Disscussions about it can go wrong ways.
Bad technical condition of the game. Disgusting content. Trolling from devs. A that little banner. Two last things easily can shove away many people. There is too much of this on the Internet to even see it in games. People plays this type of games for dreams, not to continue everyday activities.
Also, despite of spinal buttonsmashing gameplay, game lack of famous "flow" moments. Making game boring too fast. So errors in design, both game and levels.
Above that not so interesting and straitforward RPG mechanics.
This game need a tons of work to be more famous. Maybe even easier to make a new than fix that.