1. It dissapointed because of the family friendly genre like lack of blood and scars. What wrong with the cartoon blood? I watched naruto since I was a kid, did I going to be psycho that time when I saw blood?
2. Boruto developed bad character development. Every villain is just ro overpower. There is no space for other character
3. Old character like sakura, ino, the war heroes are nerfed like hell. They cant even do nothing against the villains
4. The most important, they fight aliens, omg. Did u know why everyone love Naruto? Because everyone have their stories. Let say Itachi and every akatsuki member which have the story of holpless life and turned to be Akatsuki, that was amazing. In Boruto, they just came from the sky, out of nowhere, have just a little motivation to fight, just about power?? In Naruto, we could see the complex life of Madara turned to be the greatest evil, Itachi turned to be the greatest ninja, Danzo the evil suddenly is the one's who love village the most, and others.
5. The story goes to fast
Advice : There is no chance to fix the Boruto story. The story is OK until Jigen death. But another is just a trash. They keep making motivationless character. To conclude, my advice for the creator is to end the story as quick as possible. Give naruto and sasuke and everyone's power again. Start make the villains is more logical. Until the perfect time, the creator can continue to put one last Otsusuki story again to everyone, and one last fight from Boruto and Kawaki, just like the very begining of the story.