I know, that this isn't meant to be taken too seriously, but I really hate how they threat the MC. He has many freedoms, but he earned those. But they aren't taking him serious enough for being that kind of genius he is. I'm not sure if this is a good thing, as they aren't sending him of to a "educational" school or putting him under 24h surveillance, or if this is bad, as the are snatching and snacking everything up, he comes up with. I would be demotivated beyond believe after all of this. But they do take him serious enough to extort him and beat him up. Even his own father. And his also has become serious beyond comedy, when they killed that goblin, we still don't know, if he was a brutal, hostile monster or innocent.
But if this is meant in a comedic fashion, then the author should come up with a comedic way, how MC deals with that household. Better fast, as judging from the comments, many people really stop enjoying it.