Preface: Please remember that i've not read the entirety of YYH but i've only just finished the Toguro arc.
I'm sorry but the more i think about it the more i feel that Naruto (or any other famous shonen nowadays) is far superior to YYH, even only for the fact that Naruto actually has a story where YYH does not.
Even without counting the first 20 chapters YYH feels mostly random and episodic where you can actually feel the holes in the plot on your skin, Hiei and Kurama switched from antagonists to Yusuke's best-friends-forever in a matter of an handful of chapters. Training arcs are non existent and you only see Yusuke returning from them with the "look how badass i am" look typical of the after training. There's also a very poor explanation of the universe where things are said on the fly just to justify what is happening.
The fights too are pretty poor, the only one that was qualitatively good enough to be in other shonen in my opinion is Yusuke vs Toguro and even then it wouldn't be any major final boss fight but more something with the same importance of Deidara vs Sasuke.
Aside some incoherencies stuff like Naruto (sorry i always keep using it as example :/ ) is handled much better and if you think about it those incoherencies are born from the fact that the author actually wants to give the reader a sense of context of what is the universe and how it works, stuff that simply doesn't happen in YYH because you have no idea of how the world works hence why stuff like the magic ball to power up Yusuke and Kurama absorbing the power from his former body are excused or not shitted on... no context=no complains.
Now of course you can pinpoint all the flaws i've listed and you can say "but Reborn had that too, One Piece also have no training arcs, Dragon Ball is random too" etc. etc. but hardly you'll find something that right now is famous/successful but it's mediocre in all its parts.
When i made the previous post i though it was because probably in the 90's that was pretty much the standard but then i think about One Piece and Naruto have pretty much the same age and yet aren't so bad there's also JoJo's Bizarre Adventure which is even older and yet much better.
I can only be amazed and partially happy on how Togashi managed to pull stuff like HxH after what i've read of YYH and sincerely from now i will take YYH just like a modest and mediocre shonen instead of what i've initially thought.