Yep, honeymoon period.
I honestly wouldn't be bothered with this.
Red Flag - he doesn't seem to have many friends/acquaintances of his own and depends pretty much on you for company. I love my dh dearly but thoroughly enjoy it when he goes out to bowls (usually about 2 afternoons, 1 evening, each week).
Does he work, and social life there. Of course, I mean social life that doesn't involve him drinking too much.
So, he's huffing if he doesn't get his own way. And huffing for 6 whole days. Sod that. As there are no financial and administrative constraints holding you together I'd get rid. Absolutely.
I met my now dh when I was on my own following divorce and mid 40s. He is 3 years younger. It was 8 years before we married. I was making damned sure that I knew him well and that (as far as possible) there were no traits that I didn't want.
And many 'dates' before I met him ended after one or two because I was no longer going to make do.
Think of this past year as a lesson, you don't have to make do. You are self sufficient and don't need a huffer at your elbow. Possibly he has some good points but there's no way I'd be wondering if and when he was going to have a sulk.
Good luck.