To ease yourself into Nietzsche, i'd start with Die fröhliche Wissenschaft / The Gay Science.
It's really funny and punkrock!.
speaking of this, nietzsche didn't promote subjectivism as such, his term was perspectivism: i.e. that objectivity is best reached by taking all subjective views into account. so i would say that "bad" is perspectivist, not subjective or objective.
taking all subjective views about a game into account, both those who think a game is bad and those who think a game is good, and accepting both as accurate and true reports of a person's experience of a game, you reach an objective stance about a game: that it is good for some people for x reasons, and bad for other people for y reasons.