He thinks Hazuki is just another nepo-baby who has everything handed out to him, and will ruin the company because of his unprofessional... Objectively, it's not exactly wrong impression all things considered. He doesn't really have a problem with anything else.
exactly why i was debating whether he should be trusted or not since characters like him can pretty much become villains or be mistaken for one either by first impression or not and it doesn't help that his demeanor is a bit shrewd. but like i said at the end, he's okay
Pretty much everyone has collectively made him the new grandpa hehe
i was trying to decide if Matoba is to be trusted or not but when he showed off the kids' "business cards" to Hazuki i think he'll fit right in with the gang just fine