I have to disagree with you. You may not have liked the game but that doesn't make it the worst FF. And it's not "because it is" it's because you didn't like it.

Anyway to discuss what you mentioned:

1)ITS TOO EASY
Ok it was relatively easy if you just played it straight through but I think this is true for a lot of FF games, but as is also true with other FF's there are extra challenges to make it hard for you! For example, Ozma and Hades (I haven't fought either but I've heard they are hard).

Then there are things like Chocobo Hot and Cold, which may not be very hard but it's time consuming and can be challenging.
But I didn't find FFIX any easier than FFX or FFVII (the two I have played), in fact I'd say FFX was the easiest if you avoid the Dark Aeons and Monster Arena creatures.

Sure FFIX wasn't hard but nor were FFVII or FFX (I can't comment on VIII as I haven't played it very much).


2) CHARACTERS

Well what you say isn't very clear, I mean whimsical and pointless? Why? I loved the design of the characters but that's just my opinion and they weren't pointless either although I didn't use characters like Amarant and Freya very often, that's just cos I chose not to develop them.


3) MAGIC SYSTEM

The magic system was just different, that's all - different. As all the FF's have a slightly different system. Personally I loved this system it was fun getting a new weapon and seeing what you could learn from it, then spending time training so you could learn abilities faster.

I'm sorry but I don't call the FFVII system deep, just putting materia onto whoever you want? At least in FFIX people had their own unique spells, or abilities which made the game much more interesting.
And FFX, just moving around a sphere grid isn't particularly difficult or deep either.

All these systems are just different and should be appreciated for what they are alone, not compared to another FF.

Anyway, I loved FFIX, it was fun and that's the most important thing to me