To the reviewer who thinks it is okay for a french film, wow. How superior of you? And it is a series, not a film...
As for Ann Frank, it is hardly making fun of her at all. Tis the book and the child's anxiety (caused by the shenanigans around her) that the mother decides to make disappear ... not the story.
This series is a delight and a cross between comedy and drama, very well put together and a lot of fun. Great soundtrack... as for the cancer thing, the ploy was far stronger in Breaking Bad.
I get it that for some people it wont work because it has subs, it is of a different culture viewpoint and doesn't fit into the usual series. But if you like quirky, charming and fun give it a try. Oh, and it helps if you are a bit more open to 'different'.