This is one movie where I totally get the low score. And it's even worse on imdb.

Where do I start ? At the beginning would be appropriate. The movie starts by saying that what you are about to see is "(mostly) fictional". Great. Now I will question everything I see and quite literally don´t believe a thing I see. I think the Bowie family was not in favor of the movie so there probably was no permission to do anything else. At that early point the movie already becomes useless. Why even bother ?

You don't get much music from Bowie, if you had hoped to learn something about him (like me) you can't be sure of what you get. And on top of that you get a main actor who, in my view, can't act if his life depended on it. Seriously, he wasn't convincing in any scene even if I would take the angle that he was playing a completely unknown character.

Maybe you can find something in this movie if you are a Bowie fan. I am just an admirer who likes a lot of his songs and hoped to learn a bit about them and him. If that is your inspiration, too, I suggest reading a wikipedia article.

Saves you a lot of time and has more content.

As a huge David Bowie fan, I watched this movie with my best friend (also huge Bowie fan) expecting something like The Room, to get a few laughs of it. Well, this movie was not only one of the most boring films I have ever watched, but it was beyond insulting.
First of all, the obvious: Johnny Flynn doesn't look, sound, gesticulate or sing like David Bowie AT ALL. Why was him chosen for that role? I've no idea. I want to imagine it's because most actors would want to respect DB's wishes and not participate in this film.
David is written as a whiny, dumb clown who's desperate for fame but somehow ruins every chance he gets. And boring, did I mention boring? Even when we get to the Ziggy period, it's just soulless. I don't know how can somebody turn the most extravagant and interesting person in the world into such a dull dude. I guess this requires some kind of talent.
But my biggest issue with this film has a name: Terry. So David Bowie himself says clearly both in life and in his last will that he doesn't want any biopic made about himself. His family are against this film and do not release the rights for his music (resulting in a David Bowie movie without any David Bowie song...). And they have the audacity to include his parents and his brother on this. Not only that, but to centre the movie around Terry and his disorder, being this extremely personal and haunting to David. Absolutely insulting and disrespectful.
This movie is not worth watching even ironically. Completely distasteful film. I regret watching it.