imo, artificial difficulty is when player ability has little to no influence on the task, but it's still "difficult". In most cases, this is RNG, such as getting a Terra Branford card. It can also be something that's pointlessly grindy, like getting a fenrir mount (or mobs with too much hp). These things don't require any special player ability other than hitting your head against a wall until done. Sadly, this describes the vast majority of the non-combat parts of the game. :/