Why do most Naruto villains end up not just being bad guys to be hated? Is there a reason why almost all Naruto villains end up having very good excuses for becoming villains and start being seen as fighting for a different cause as opposed to just being the bad guys who need to be killed? What I mean by this question is that, why do Naruto "villains" never play the role of the standardized "bad guy", but instead introduce a new and different struggle from their point of view? Instead of having one clear person to hate and criticize their actions, you end up with two very different view points, never a good vs evil kind of situation, but more of a clash of opinions.
because bad guys never own up to their actions but instead try and justify their actions as being just, take this example

bad guy tries to destroy the world

bad guy: humanity has been slowly killing the planet for eons

hero: but that give you no right to destroy it

bad guy: if you saw a man dying from causes beyond his control and there was no hope in saving him, would you not want to end his life and ease his suffering?

hero: and what about all the innocent people living in the world

bad guy: is anyone truly innocent, every human uses technology that harms the planet, they know what they are doing is hurting the planet are doing yet do nothing top change but instead leave it to their leaders to make the change who instead squabble amongst themselves and when one takes the initiative others fear of their separation from the collective and brand them as evil and wage war at them harming the planet more

hero: but humans can change

bad guy: correct but only to save your own skin and never for the sake of the planet that sustains your destructive nature at the cost of it's own health

so in Naruto where the villains explain their actions and it seems as a conflict of opinion it's still just your standardized bad guy trying to explain that his actions are right and the good guy has no right in stopping him