Naruto is a battle shounen in the vein of Dragon Ball but with significantly more angst. I'm of the opinion that DB can get away with bullshit simply because it's such a likeable series; Toriyama has a great sense of humor and a flippant attitude regarding his own work that Kishimoto seems to lack. Naruto tries to be sentimental and emotional but most of the time falls flat as the story is shoddy and terribly juvenile in the worst way.
Things feeling unearned or undeserved is a running theme in this manga. Antagonists suddenly become good boys for the shallowest reasons and it almost always feels undeserved to the point it feels like a red herring setup (for instance, a certain meanie head bad guy character that does the most heinous unit 731 type shit throughout the series gets reintroduced and goes "I guess I'm nice now" and everyone just goes "ok cool" and he remains good and all his crimes ignored). Powerups and asspulls are more annoying in Naruto than in other manga , and it feels like whenever a question like "How do I get every character on the same page in this scene" the answer Kishimoto comes up with is "They read eachothers minds instantly through the power of love fuck you". We rarely get training scenes or even references to training; characters will often just suddenly have new abilities, and if we're lucky we'll get a throwaway line explaining how they bullshitted their way to get it within the past second.
This manga has a huge *teleports behind you* problem, which is indicative of a larger issue: Naruto is superficially cool. Characters are all super badasses with tragic backstories and cool eye powers and the higher their angst the higher their power levels. The famous "Naruto run" is cool until you realise that military professionals that rely on their hands being clasped to perform combat actions wouldn't let their hands dangle all the way behind them in a combat situation; military operators don't leave their guns on their backs when they're in a firefight and neither should shinobi.
In a manga so much about community and making connections, this manga has the Dragon Ball issue of characters just becoming obsolete and underused. Characters that were vital at earlier sections get a single panel explaining what's up while the big boys continue the plot. If you aren't super saiyan then you're useless and if you don't have sharingan or biju then you're useless.
On a more subjective note, I found the fanart between the chapters disgusting, and ironically reflective of the actual manga in that they were often flashy but a cursory glance reveals it to be extremely lacking and has deviantart written all over it. As someone else commented, the colored pages were unnecessary and I skipped all of them immediately.
All that griping aside, I'll admit it wasn't a completely worthless manga. I enjoyed some of the character interactions, and laughed a handful of times at some of the sillier antics. The action scenes were all very clear and easy to understand. The simple character motivations were shallow, but I guess that also means you won't get confused! The ending fight between our protagonists was satisfying for what it was and the epilogue was cute.
All in all, Naruto is ugly, angsty, shallow, and terribly juvenile (but less in a "Dr. Slump" juvenile and more in an "embarrassing middleschooler fanfic from 2006" juvenile). In other words, it lacks the depth of mature manga, but lacks the charm of childish manga. If you genuinely and unironically enjoy this manga/anime as an adult, then I suspect you're immature and emotionally stunted in the same way that grown men that listen to Linkin Park and Disturbed are. Would not recommend to anyone