“He must have had a plan — and it must have been diabolical!”
The one great misconception that everyone believes about Dark Shadows is that the lead vampire, Barnabas Collins, gets “redeemed” once the show reveals how he was cursed to become one of the living dead. The idea is that Barnabas started out on the show as a cruel, remorseless villain, but then we go to the 18th century to see his backstory — and by the time we come back, he’s become “sympathetic,” and we’re supposed to like the guy.
In fact, Barnabas’ only real pivot in 1968 is that he starts out as a partially inept villain, and becomes a totally inept villain. Apparently, if you’re bad enough at being a bad guy, you can circle back around to good guy.