The original release of FDF 1 was actually much harder than official games. However, a balancing patch was done before the Steam release which brought the difficulty down a ton, and FDF 2 is also based on this amount of difficulty. The Extras, on the other hand, are still incredibly punishing.
Of course, ZUN games themselves vary widely in difficulty, from LoLK on the tough end to LLS on the forgiving. PCB is known for having one of the deceptively tough Easy modes compared to its Normal. So there's no shame in where your skill is now, just keep playing and you'll keep getting better.