Nope. They do acknowledge (often by Worf saying so) that he was never a very good father, though he did give it a try at least a couple times. Also, when Alexander went back to Earth (presumably following "Generations" and the loss of his home, but really at any point from "Birthright" onwards), it was arguably so that Worf can so his post-Troi solo soul searching or whatever (no families on Boreth?) and there's no reason to believe that the two would not be reunited at some point following that.
Then Worf got called to DS9 and the Klingon tensions got bad, Worf got offered a promotion, and it wouldn't be a very safe place for Alexander and his heritage to be caught in the middle. Then Klingon stuff got better but the Dominion War started almost immediately after. Was Worf in the wrong place in the wrong time? Was he really running away or was it equally the circumstances that kept him from bringing Alexander to DS9?