As many people already said here - it's just a scratch on the surface, that's not about Karl it's about Jacques,...
I agree, it's just a scratch on the surface, but it's not a mistake, it's just a different perspective on Karl's life. Maybe it was different, maybe not, but who knows?
As his Daniel said - He never lost touch with the pulse. A time of revolution, of sexual liberation and then there's that anachronistic lement to it because Karl Lagerfeld very often lived in his ntellectual realm and in his fantasy and with the money that he had earned was capable of creating these cerebral worlds, these fairytale paradises, especially for the love of his life. He bought a castle and everything within the castle had to be perfect down to the candles. To play someone who does that with so much dedication and obsession and precision was fascinating.
I really like the way of acting, Daniel is experienced actor and great choice for Karl. Théodore is same age as me, he exactly knew, what to do and I do not agree with others, his acting may be different, but not childish or boring. Visuals are great, so don't judge a book by it's cover and give it a try.