While Darlene struggled throughout both Roseanne’s original run and its spinoff, The Conners season 6 premiere saw the show finally address her complicated story. Darlene had a hard time during Roseanne’s nine seasons, but the sitcom made it seem like she was destined for great things. Darlene was smart, savvy, and a great support to her family and her love interest, David Healy, who came from an abusive home. As such, it was an unwelcome shock when Roseanne’s series finale revealed that David ended up with Becky, not Darlene. Roseanne’s revival retconned this, but not the way viewers expected.

https://screenrant.com/conners-darlene-season-6-roseanne-story-ending-change/