typical chinese style novel where when there's no plot time travel to future when something interesting happens, MC was born 1500 years before Thor and by time travel shenanigans both MC and Hela are younger than Thor.
has the potential to learn magic and explore divine energy beyond physical strength instead becomes slave of holy light. his growth is so slow that the tree he planted 1500 years after his arrival grows stronger than him before the MCU plot
author doesn't know the speed of light and uses phone communication as instantaneous between universal planes, not galaxies and not solar systems.
even if earth developed ftl phones they would only work in a single galaxy or at best universe. forget about different universal planes with different rule.
book is all over the place, author wanted to introduce multiple different concepts and then shat on himself and gave us a diarrhea.
just because MC has system he forgot that he can learn things normally like a person.
i thing that irked me is he took on guise of uzumaki and wanted to trade info on uzumaki clansmen but never completes the transaction with kushina because of other shiny abilities. he could have traded that information like a normal person and learned sealing from kushina which she was willing to provide him and get acquainted with him. author simply forgot about how to do things like a normal shinobi.
genin naruto kills zabuza with ease in their first encounter with just suicide clone bombings, he doesn't have a single of trait of naruto that makes the manga and anime good.