Not quite, although your overall point is correct :) The only real evidence we have of her personal drama is all press, and it’s not really great source material :)

1912 society loved melodrama, and the frenzy and demand for Titanic material started to turn violent. It’s just good press for your film if you can promote an actual survivor, in actual clothes, and on top of that paint her as a tortured yet heroic figure bravely fighting her trauma for you… the viewer. This was a society obsessed with heroics. The reports of her bravery were all carefully constructed in press releases from her studio.

As for ‘ruined’ … I wouldn’t say so. The film was an international hit, with a only a few editorials grumbling about taste. Dorothy’s stepping away from film seemed to be more a choice than a failure. Her very scandalous public affair and case of manslaughter did much more to derail her than a hit movie, but she did switch to theatre and opera between the two.

Whatever happened, we don’t know, but like you said - after that film she went from being a huge movie star to …. not. There are multiple possibilities why, but our sources are all tabloid and come with the purchase of a salt mine :) the film itself though was very popular.

She went on to live, well… quite a wild life :)