>>282964186 (OP)
This guy is basically modern age Kenshiro.
He is a good guy and very compassionate,but is never castrated by the story by showing him pulling the bullshits deku has pulled or getting completely demolished like Denji in part 2 or Eren from chapter 121 onward.
His kindness is not baseless either, since his background gaves a huge justification for why he act in some ways (being the mature brother among a huge family of kids, and the sole one bringing any money since the mother and the older sister has to work for said kids while their father died flew years before) and the wjole thing being kickstarted by him refusing to let got the only family he has left makes his kindness hearned and very realistic.
And still he gets crazy moment, he is allowed to get angry and sometimes pull crazy hardcore stuff instead of preaching moralfagness at each corner, like when he broke Genya ‘s arm when he was being a jackass and later headbutted his brother Sanemi despite him being stronger and superior to him, or stopped Uzui, or killed Hantengu and Gyutarou.
The best part is also how, in the end, he is not even the chosen one. He is not the secret descendants of a god nor the strongest good guy in the story , actually by the end he is still weaker than Sanemi and Himejima, let alone never reaching the height of Yoriichi… and even then him not being the descendant of yoriichi is also a plot point that ties to the themes of the story and makes him part of the huge cast and not the single important member of it.
To summarize a little, is not that he is a super new kind of protagonist.
He is actually quite an old one, but in a current time where too many authors try to hard with being subversive and than failing spectacularly, to the point this old kind of protagonist has returned as a novelty.
And the flew little subversions Goutoge pulled gave enough of a fresh air to elevate him.