Thanks for translating but honestly seems like a waste of the teams' effort, this just seem all around bad in ways that I find annoying to articulate.
It lacks a sort of "sincerity" is like if a (older version of) Chat GPT was fed generic Isekai fantasy manga and was asked to come up with a story, it sounds awkward, the characters lack substance and credibility the MC seems somewhat robotic the way he expresses his emotions doesnt seem stunted but somewhat alien, the design is competent but generic, it makes me think of a deviantart fanfic.
This could have been a somewhat interesting story, if it had a different pace and different execution.
The father might have isolated the child, without resorting to violence, maybe try to cram in as much knowledge as he could through books, but the protagonist can really learn only by HEARING others, the frustrated father never sends him to school because he is embarassed, so you still got a bad father but now he looks more credible.
Perhaps the death of his parents sets him in a journey of discovery and that would the story, getting from place to place, listening to people, a tale of self discovery, empathy, something about how you have to do things and see them for yourself how you can't just expect to see the whole world from inside a library stuck at home.
In time he could become strong, but not right away, not as a teenager.