Naruto was about this generation not the next one.
We saw that the previous generations screwed up and now it came to Naruto's generation to finally makes things better.
Creating a new generation does not fix the problem. What it actually does is introduce another one. Because effectively what he/they said is that every generation will screw up and there will never be any for of a fix/repair.
It's up to the next generation and after it's up to the next generation and then it's up to the next generation and then it's up to the next generation and on and on until the end of time.
By introducing this current generation he/they didn't fix the problem. He/they just made another one that will go on forever.
That is what they were aiming for, the don't know how to create a good storyline. Instead of fixing they add more things, in hope that the fans will forget about the previous one and start to focus on a new one, leaving the previous one abandon, unclear and unresolved. The most PRIME example is chapter 3 bench scene, its still unresolved, sakura is forever will never know the truth about that.