I'm not sure I'd call FF2 bad, but it's certainly frustrating. It has a lot of interesting ideas, it originated a lot of the series iconic things(Chocobo, Dragoons, etc) and the plot(at least, on it's surface) is interesting.Part of me hoped you would say Final Fantasy 2, 8, or the 13 Trilogy
It's just rather poorly implemented overall and the idea of "Learn by doing" is so easily abused to break the game because otherwise it's really fucking annoying. I think the issue is it's really ambitious and those ambitions didn't quite translate into compelling gameplay, but from a game design perspective it's interesting.