What is it that you don't like about David?
Well, on a meta level the second David shows up is the exact moment when I could kiss any chance of two of my faves (Louis and Daniel) getting to do anything ever again goodbye. David stole Louis’ role as the bookish love interest and knowledge seeker so hard that even though Merrick (which is a shitty book, but that’s beside the point) is ABOUT LOUIS, David is the narrator.
He stole Daniel’s role as the reporter/chronicler, too – I’m still flabbergasted that when we finally got to have Armand confess his backstory in a modern context (even if TVA makes me want to claw my skin off in several respects), it’s not his first and only fledgling who gets to hear it but this fuckwit yahoo whom Armand has no reason to trust (and who is a leering creep throughout).
On the subject of creepitude, I don’t like him as a character, either. Even in his capacity as the old, mortal head of the Talamasca he’s a patronizing dickweed (you just know that Actual Adult Professional Jesse put up with a metric ton of mansplaining all day every day), and he’s right up there with Marius as far as taking advantage of underage partners (see: Merrick – don’t worry, she’s PRECOCIOUS, so it’s FINE that she’s like 13).
When he’s not being an asshole or a creep he’s just DULL – there’s not a single aspect of his character that another existing one doesn’t do better, but he’s Anne’s Chosen Love Interest for Lestat (you can SMELL the pissiness when she wrote that Louis reunion scene in PL, on top of all the other issues) so we have to keep putting up with him.