Hunter x Hunter is fundamentally an exploration of the most fundamental philosophical issues:
Do good and evil exist?
What is selfishness, and is it really bad?
What should be?
The characters in HxH are fundamentally NOT flawed.
It's the world that is flawed.
Even Genthru and Alluka who are arguably the most flawed characters in the series are Manifestations of Ideals and always acts on their conviction without fail.
HxH is about those ideas.
It is a battlefield of Ideas.
If you are not studying philosophy, follow me:
Kurapika is very much cynical and Darwinistic in the beginning, but he ends up understanding that there is no destination at the end of that path.
Gon and Leorio are idealistic and remind me of Kant and his followers, but they end up getting crushed by the world.
Leorio is 100% pure Ullitarism.
Hisoka is Jesus Christ.
Chrollo is Nietzsche.
I only scratched the surface, there are many more layers beyond that.
And yes, the characters show angst and weakness, but generally, HxH is not about pulling your strength together and overcoming something - NO, HxH is about WHAT is actually right in the end.
Gon in CA arc, ends with the question open: Who was right? Who was wrong? And does that even matter?
Its an exploration, and it is truly profound.
Now, if you have no interest in philosophy, in real truly fundamental philosophy, then you won't get much out of HxH beyond just a
"deconstruction with a story(that you won't be able to relate to), great visuals and sound and cute characters"
But it really has that kind of content, and it has a LOT of it, and THAT is what makes it truly groundbreaking.