>Any biopic of her is going to be hard to watch and if it tries to be a happy movie, it is not an accurate biopic at that point

The main problem is that Blonde is hard to watch to the point of exploitation and also still inaccurate. The issues with Marilyn's life you mention are interesting and could have made for a good movie, but Blonde only includes some of them, and in twisted ways. Also while I'm almost 100% certain the creators intended the opposite, part of the movie feels unsympathetic to Marilyn, and even sometimes paints her in the stupid, hysterical light her detractors/abusers forced onto her image.

Beautifully shot though, I wish the same visual talent had been used for almost any other film.