As has been said above I'll have to take your word for it on how true to the books they are as I'll never read them. If the gaping plot holes and tedious storyline have been faithfully reproduced, as you say, you can judge them by that criteria. You have however brought a point that always leaves be a little bewildered. In an advertising campaign the minimum expectation is that you manage to deliver a consistent message in each media. Each media, be it TV, radio or print have their own strengths and limitations. The nature of each and the differences in the way they are consumed dictates their forms. In this case books are books, films are films and really it's a blind alley whether the two forms are alike.
These films should be judged first and foremost on their success as a piece of cinematography.
They fail in every conceivable way that they could fail. No attempt to develop the characters leaving us unengaged with the plot. Sterile sets and performances to match. Visually there's so much going on in some scenes it's like being stuck in a techno-blizzard, with the audience detached until the white noise of the effects dies down and we get a chance to get our bearings again.
Ultimately they are such poor attempts at story telling that you see them for what they are: Millions of man-hours wasted as an excuse to crank up the merchandising wagon, video games, etc. Lucas is treating his audience with contempt churning out that vacuous dross.
So, once again I'll say "Fuck you, George Lucas".