Say what you want about it atleast it was a Star Trek movie, it had the feel to it that XI is missing.
I agree with you in full. Nemesis had depth and complexity to it that XI was missing. When I sit down and watch Nemesis I think "This is Star Trek." When I saw XI I thought "This wants to be Star Trek, but isn't."
Now, Nemesis does have its problems, plot holes and what not, but if you ignore them the movie is quite enjoyable. XI's problems and plot holes stick out like a leading zero and take away any potential enjoyment the movie could have.