Since you think resurrecting a few months old conversation is annoying, I can't help but summon you from two years into the future. You brought it upon yourself!what I find even worse, is a former adult (let's remember he was isekai'ed) thinking that saying rude words, is enough to be the vilain of a novel. As if dark vador was the bad guy because he was rude.
He's giving Harold leeway with his speech because of just how outrageously profitable his plan is, I would assumeThe rude dialogue is just incredibly distracting to read. It's just bizarre that the old man is just ignoring it and pretending like the insults aren't there.