I am not talking about animes where the exception exists.
Since as you will see many of these exceptions exist simply because the format is different.
Digimon
Uhhhh... Well ok original series this certainly doesn't do what I am talking about.
Everything afterwards though often falls directly under this... though they usually pick three characters to have a true arc. The Hero, the Rival/villain, and the other one.
That's not just a standard for anime, y'know. That's almost like a universal standard. Need I bring up Twilight? It's definitely not specific to Japanese animation, or even any kind of media in general. It's just easy to write. Like how Mary Sues are popular, yeah?
Yeah but Anime likes to at least pretend there is a point to the secondary characters. "Hey I have an emotional arc, a clear goal, and a motivation. Everything needed to be a dynamic and full characters... Am I?"
Writer checks the list: "No not really... you are actually more of a obstacle for the main character to overcome in the guise of a well rounded character and your motivations will be thrown out as soon as that happens."
"What? What hack anime is this?"
"Anime? This is Ratatouille"
Yeah... and Dragonball wasn't even like that, most of the time
Dragonball was when the show still worked and worked well. Other characters actually got victories and their arcs actually played out in full and they weren't brushed aside (well except Yamcha... poor poor Yamcha).
about Goku's maturation
I always thought that the entire point of Goku was that he was Peter Pan and that his child's heart was the source of his great strength.
It is sort of what made Gohan seem incredibly disturbing. Since Goku is basically a child and lacks... understanding.
Neon Genesis Evangelion
Loser one note pilot who is the main character over much more interesting and deep characters? check! Has a smug rival? Check!
Gunslinger Girl
Blank slate main character with smug more interesting rival? Check!
In each of those cases, either the protagonist doesn't always win
Who ever said the protagonist never loses? The key is that the protagonist wins passively.
Heck in Dragonball it takes more then half the entire anime before Goku legitimately trains or practices.
You're mostly talking about DB/DBZ, the Big Three, Fairy Tail, etc
Oddly enough that wasn't even what I was referring to. Given the animes I watched what I spoke of is more indicative of the hobby and martial art animes.
Also Fairy Tail is certainly not that... Admittingly Natsu doesn't have as much character development as everyone else does (in fact he has the least) and Grey seems to have reverse character development (In that he seems to get LESS mature as things go on) but no.
And Dragonball REALLY isn't that, at least after the first arc (and even then the first arc was an adventure... So it wouldn't even count). DBZ though... yeah...
you absolutely cannot make a blanket statement when a lot of the more famous series refute that
Refute what? "Most" your statement doesn't disprove most.
I can come up with a lot of romance novels that aren't, for example, garbage... but it doesn't mean I've disproven their existence.