Just ignore those people. They have allergies for women and love. Nevermind that there's obviously nothing between them. I mean, it's true that romance in shounen genre are not well written, but that doesn't apply to all of them.
Same, the grandpa is so goofy i like him. And the devastated familiars when his cooking goes awry lol! I see little to no romance at all with whoever he was travelling with, i dont know where they see the 'romance' pop up. But also its stated clearly that them travelling together is like, a convenient method since they're all heading to the same direction anyways.
Absolutely NO hate to anyone but I was surprised to see how many readers dislike the girls travelling with him. They honestly are not the most insufferable women characters I've encountered in these kinds of comics though so maybe my standards are low, hahahahah. Anyways, I totally binged this and found Arito to be a very charming individual. Love him and his grandpa's dynamic so much