*doesn't get the hate for the Argo...*
I don't hate it...I just hate the way that it was used. Personally I think it's a pretty neat idea, and something that adds a little more depth to the Star Trek Universe, but I felt the set-piece it was created for was wholly out of place, and inserted into the movie as a way of artificially making its first third more exciting.
It failed, if only because the dune-buggy chase had no relevance to the larger story being told. Their attackers had no connection to the larger Romulan plot...hell, if the opponents had been Romulans it probably would have inserted with greater coherence into the movie and seemed like it fit. But those other aliens who chased them...meh...who cares?
The great tragedy of Nemesis was that it was full of this kind of unrealised potential, and the 'A Time To...' books have a cherished place on my shelf for attempting to salvage good story-telling from wasted opportunities and make their own magic.
Captain Picard meets an evil version of himself. Who denies that has the potential to be an awesome movie? What better villian than a character we know and love? And what better heart-wrenching conflict for Picard than to see an image of himself attempt to wreak massive havoc and destruction? Roll in a chance to journey into the Romulan Empire and taste the sights and sounds of an alien culture on the movie screen and you have the components for the best Star Trek movie ever made.
Personally, I think the biggest mistake was taking as an assumption that they should cast someone other than Patrick Stewart to play Shinzon. Tom Hardy was thoroughly unconvincing as a young clone of Picard. If the role of Shinzon had been written with Patrick Stewart in mind, and we saw him play off against himself on screen (something which Star Trek has repeatedly done very well, particularly in TNG - Will and Tom Riker, Data and Lore), I think it would have gone so much further to be a good movie.
Martin Madden is just part of the larger tragedy of Nemesis. It's the scene we should have had - setting course for frontiers unknown - but executed so poorly. It could have been so good. And instead we got...medicore.
That's why Nemesis is so hated, I think. Because everyone sees the potential, but only a very few people actually see it realised in the final product.