So there is a translation error at 19:12. The translation is showing "God, you're a pain in the ass". The actual translation should be "You don't change as usual" It's a Japanese phrase that leaves out things for context when you read inbetween the lines it's heard as "Your (annoying) attitude doesn't change does it?l" I put annoying in parenthesis because while it's never out right spoken, the way the inflection in Max's voice is given, he thinks of her attitude as annoying. The translation "God, you're a pain in the ass" sorta sumarizes it up too much and misses a lot of the inflection that the phrase is voiced and the subtle meaning behind it. "Unchanging, annoying, etc.". The current translated phrase only sums up the present but doesn't reflect his opinion of Maou from both the past and future hence forth.

By the way wtf is this show? The Maou went from being male to a deformed debu "female(?)" I might watch 2 more eps then drop it like a rock. It's not good.