why don't people like arwen in the movie?

I for one thought arwen was great in the movie, i love the scene with her ans frodo run away from the black riders.i wished that Tolkien would have written more about her.oh well,thats just what i think. :<P> : princess of rivendell & mordor :<P><BR>Smeagol: Argh!! What’s he doing! Stupid fat hobbit! You ruins it!<BR>Sam: What’s to ruin? There’s hardly any meat on ‘em. <BR>Sam: What we need is a few good taters.<BR>Gollum: What’s taters, preciousss? What’s taters uh?<BR>Sam: PO-TAY-TOES! Boil ‘em. Mash ‘em. Stick ‘em in a stew. Lovely big golden chips with a nice piece of fried fish.... <BR>Smeagol: Pbbbttt!! <BR>Sam: Even you couldn’t say no to that. <BR>Smeagol: Oh yes we could! Spoiling nice fish... " Give it to usss rrraw... and wrrriggling! . You keep nasty chips". <BR>Sam: You’re hopeless.<BR>---The Lord Of The Rings:The Two Towers---