I agree with mcsbryk. Adam started out interesting when he was non-verbal, but his very presence screamed "gimmick". We've done a vampire, so let's shoe-horn a Frankenstein monster into Collinsport. This was the time when DS should have been about Barnabas's transformation and adjustment to being human. That would have been real, and affecting. We should have had many moments such as that one when Lang threw open the curtains, with Barnabas re-experiencing everything that had been denied him for centuries.
Instead, they thought they had to resort to manufactured "conflict", in the form of the same blunt, uninteresting threats being issued by Adam day after day, week after week. This was high-school creative-writing-class writing. Remember, you must have "conflict", they'd tell us.... so students would turn in paper after paper of people arguing over nothing!
The moment they turned the spotlight on Adam off, when he takes refuge in Stokes' house, that's the moment his story becomes interesting. His education and maturation are worth showing, not his threats and hostage-taking.