Naruto become one of the most popular shows out there, thanks to it becoming accessible to so many kids since it aired on Cartoon Network before those runts had to go to bed. Because of that, anime in western cultures became associated with now not just Sailor Moon, Pokemon, and Yu-gi-oh, but now Naruto. Naruto, a show about some whiny kid with ninja powers who ultimately was an unlikeable and unrelateable character. A complete idiot with no sign of really changing, other than becoming shounen hero by the time Sasuke turned all evil for whatever reason.
It muddied anime's image in the west a little more, as well featured a plotline that wasn't too unique, and could be summed up with "shounen shit". Similarly, the action in that show was also very shounen, and didn't really have many limitations as much as I saw into it, so it was reasonable for characters to pull Deus ex Machinas because of some secret technique they all seemed to be able to pull out of nowhere. Hint: Deus ex Machinas have nothing to do with strategy as much as they have to do with upping the anti, raking more fan interest and more viewers more than anything. It's what killed Dragonball Z.
Also, isn't "Coming-of-Age story" just something librarians tacked onto books to make it more appealing to the kids with Teen-complex (the liking of something due to some sort of inherent complexity despite how ridiculous it maybe, including but not limited to the use of over-complex/archaic vocabulary)? Sure, the kid stops acting like an idiot after a couple hundred episodes, but does that making it a Coming of Age story, or rather the producers realizing "Hey, this character-type is bad for the serious we're trying to go for now, maybe we should stop that." Naruto from what I've heard was intended to be a bit of a comedy in its first volume before shifting towards shounen-action thanks to its powers and such.
And sure, you can skip over the filler NOW, but imagine having to sit through that for weeks and weeks on end when it was still airing. What kind of ego do you have to have to have expected people to watch through so many episodes that amount to nothing? It could've done what every other sane manga/Visual Novel series adaptation does and take a break from production while waiting for new material. Instead, they made the filler. Why? To rake in more viewers and cash, which just shows how shallow of a show it really is.
I don't think the "popularity of monologues" should be a valid point. What's probably going on instead is that the monologues in Naruto are either feel forced or are half-baked. Monologues can be good, just not in the midst of battle while talking to your enemy.
And why does it figure that you also like Death Note?
EDIT:
Dr. Cakey said:
Probably the most important thing in this post. Naruto DOES say "Believe it" in the Japanese version. Specifically, he says "dattebayo". Not knowing a lick of Japanese I can't tell you what it means, but from what I've gleaned, "believe it" is a kind of okayish translation. Oh, and he says it at the end of ALMOST ALL of his sentences, the way 'cute' anime girls end their sentences with "desu".
You're right, you do not know a lick of Japanese.
Not sure exactly what dattebayo means, though I'm absolutely sure it doesn't mean "Believe it." (The closest translation I get to something that makes sense is "We must stand". Interpret that as you like. I'm basing this off of 「立ってばよ」 by the way.)
Also, "desu" is NOT just used by "'cute' anime girls", but is a formal ending to a sentence, usually translated as "It is". I don't see how this can be the most important part of your post other than to show the discreditably your defense of that phrase is.