oooh i didn't knew that game had a bad rep, never heard much about it myself.
I bought it day one and found it quite fun, it has a simple "dojin-like" gameplay which mix TPS and action and absurdly fun characters that we can explore in this world.
I would say the biggest problem of the game from a fan perspective is how "concrete" it shows the exterior world of Danganronpa. It was always "even worst" in my thought when we hear about it in the original game.
But other than that, it's like a fun short little game, with a genre where you don't usually see fun short little game which is actually why i like that much.