Johnny Galecki's David Healy has been officially vilified in The Conners, but surprising as it was, the original Roseanne series has explained why 26 years ago. Known for its relatable portrayal of the middle-class American family has survived several tragedies since it returned on the air via a revival. Roseanne's death is arguably at the top of the list in terms of their misfortunes, following the Conners matriarch unexpectedly dying due to an overdose. That being said, not all losses are due to permanent deaths. Some of them are due to other factors, which can be worse.
https://screenrant.com/roseanne-the-conners-season-5-david-destroyed-reason/