We are discussing if a fictional character from a fictional world is underrated or overrated??? SERIOUSLY???
OMG
Seriously people, get a bit more real, how can you discuss something that doesn't exist, how can you discuss something that comes from the imaginary of one single person (Kishi).
The characters are as strong as Kishi wants them to be.
Is Kakashi (my fav character) strong???
Well, just read the Naruto Databook made by Kishi.
According to the 3ª Databook, Kakashi is definitely one of the strongest character in the series, and that's not my opinion, is the opinion of the author.
In the Databook, Kakashi have a level of 34.5 (max. 40)
Gai have 31.5.
Gaara have 29.
Hiruzen had a level of 34, below Kakashi.
Tsunade have 35
Kakuzu had a 32.5 level.
Hidan had 31.5.
Asuma had 32.5.
Itachi and Jiraiya had both a level of 35.5. And they, were, according to Kishi the strongest character.
So, as many of you, hopefully, can see, Kishi made Kakashi definitely one the strongest character.
And this, is the way that Kishi sees HIS world.
Is Kakashi Underrated??? Only by the haters of the character, not by Kishi.
A true NARUTO fan, reads and sees everything, anime, fillers, movies, manga, and, of couse, the Databooks, that Kishi provide.
Never assume that you know more or better then Masashi Kishimoto, because you will never know. What he writes is the only and final truth, if you don't like it, go watch Pokemon or Digimon.