I think a lot of people read posts on here and like playing a game on PS or watching eastenders, we want a bit of drama.
Yes, some might read and see something glaring at them that others of us don't see, which colours their responses.
Ultimately, you're the one who has to live the rest of your life. Not us. Yes, we can be a sounding board, but that's it. We're not your friends, we don't necessarily have your best interests at heart and we don't know the whole story.
What your relationship seems to be lacking (which is a good thing) is drama. There's no elaborate walking out, violence, locking of doors, stomping home, refusing to engage etc. So to me (who comes from that sort of relationship history), you both sound level headed.
I guess the question for me is if there is still love and attraction on his side. That would be my only question as that is the only thing you can't get over. If that's missing, you're fucked.
I'm not sure whether he has mentioned that. I'm skimmed rather than read as I mainly read the posts telling you to pack a bag and go home.
That you're talking is good. Maybe some counselling would help. You haven't mentioned or gone into detail (nor should you) about what he feels the issues are, but perhaps counselling might help.
It's a marriage, it's not a teenage romance. (Well I think you're married - maybe not).
It all sounds pressured. Can you take a hiatus until the end of the holiday where you agree to be civil etc. and address it when you're both on home turf?