There isn't that much written about Bjorn Andresen and not many interviews that I've read but I formed the impression that after making Death in Venice ( a film I love and have watched many times) he became what they call these days "entitled" and assumed because he'd been lucky enough to land the role of Tadzio (which didn't call for much in the way of acting ability,) the rest of his career should have been one long success. This didn't happen though he has had a number of acting roles during his adult life, details of which were hardly mentioned. I got the impression this change to semi obscurity left him resentful. I've met him several times and this impression was borne out. This unflattering aspect of his character was never explored, in case sympathy was lost I suppose. Although for some reason the row with his much younger girlfriend on the phone did give a glimpse of it!
The film was also very unbalanced, a few seconds view only of the famous film and Venice itself, nothing at all of the beautiful Hotel des Bains where it was set and far far too much time spent on his time in Japan. Very little said about his marriage, which ended after (I originally understood) to be the "cot death" of his younger child but in fact according to him, occurred because he passed out on the child while sharing a bed with him through intoxication. There seemed a distance between himself and his grown up daughter too though they were friendly. In fact I wonder whether this emotional detachment is a feature of the Swedish character and a reason why they seem to find relationships difficult to maintain. So I remain unconvinced that the Death in Venice experience as it were paved the way to a later unsatisfactory life, via exploitation etc. It played its part by raising expectations, but any unsatisfactoriness in later life must be mainly attributed to the kind of person Bjorn is.
I was interested to see he has a sister, something I've never till now heard mentioned, and that his mother was much more present in their younger lives than I'd realised. Yes, an intrinsically flawed personality albeit of an intelligent and not untalented man. I don't think we can blame Death in Venice for that.