
Here's my 2 cents: what Hazuki said was ooc, but the fact he said that is normal. People can say things they dont mean, or misphrase what they mean, when they are in a mentally unstable state. It would be bad writing if a character do sth ooc even after consideration. But in this case we can see that Hazuki is having an outburst after a long time of bottling up; he's not being rational.

If you really thinking about it it’s actually not ooc for him to be blowing up like this all these insecurities about being bad with kids and not working hard enough for his family have been building up since Minato was born. Like when he took a nap and no one had an issue with it but him. And to see Naoto compliment Otoha on something he feels so bad about was just to much for him and the volcano exploded and he lashed out. I hope with this argument we can finally get to the root of the problem and destroy it completely after Hazuki profusely and sincerely apologizes of course.

I like the way this volume is going. Marriages are not always fluffy. This conflict is not some dramatised plot or common jealousy trope, but the author is trying to delve deeper in the characters and bring out development in them. Honestly when I saw the news that there would be a new volume, I hoped that it was not all about fluffiness and wholesomeness where the characters are almost perfect, or about other side characters. I want the couple to face and overcome some marriage life challenges together. Fights like this one would definitely help cement their relationship and help them to understand each other even more.
Now I hope the author handles this well!

Great art but terrible plot with terribly built characters. What a waste of beautiful art. Most othe works from this artist are disappointing in plot as well :( I was a big fan of their djs but not series like this one

I'm pretty sure this manga was written by Aga Naomi, whose works i agree with you—is really not it; very poor plot building + characters most of the time (except Oni to Tengoku) and the artist was Yoshi, whose works are phenomenal however (e.g. Agattetanse, Pointless Propose Marriage, etc.) so if you like the art, you should check out Yoshi's works! ╮( ̄▽ ̄)╭
Finally some REAL drama after a long time!