While Komorov did die a needless death in space it’s unlikely that he went down cursing everyone, at the very least it’s unlikely he was communicating this to others.
This claim comes from a book that various historians have said was probably inaccurate and their sole source for the recording claim is a man they most likely didn’t interview.
I’m not trying to take away the impact of his death because it was awful and he and the other cosmonauts knew it would happen but I feel like it’s awful enough that it doesn’t needed an added inaccuracies for drama or whatever.