One comparison I like to make when describing this manga is with Mitsuru Adachi's Touch, because in both manga the main character has family member(s) who die and that becomes the galvanizing force of the story. In Touch, the brother doesn't die until something like 10 volumes in, after we've spent a lot of time with him and we've understood exactly what he means to everyone who's left behind. In this manga, we see the family for exactly 3 pages.

What I mean to say is, there's nothing that stays long enough to have its impact felt. Everything is just constantly in your face, all the time, their only purpose being to propel you to the next thing. There's no pleasure in the telling or in the reading of it, no small moments of joy or moments of awe. The story isn't going anywhere, except toward the next plot.

I'd forgive some of the initial problems if it starts feeling like a story that somebody needed to tell, but it never did. Remember that Naruto was about a lonely boy who wanted to make friends, and Fullmetal Alchemist was about a confrontation between science and god, and they established this from the very get go. Maybe if you were trapped on an island this'd be a way to pass time time, but why read this inessential, poorly written manga when you could do literally anything else?