Thats how I saw that too. Grumpy, yes, but calling him an arsehole, bastard or horrible person sounds a bit over the top and biased, maybe too invested, to me. Maybe it was the thought of her getting yet another creme coloured pumpin was a bit much for him.
TBH I would be fed up with her vlogging what he might think of as 'you+me'-time too, especially after that Milan trip (wasn't that a birthday present to him?) where she behaved like the stereotypical, embarassing, influencer.
In general, I honestly think they are fine. Maybe they should have a wee talk about their family planning if she keeps dropping comments about baby and marriage in her vlogs.