I used to watch OG NCIS fairly often. Or maybe I just borrowed the DVDs from the library and binged my way through much of the show. Regardless, at some point — probably around the time Abby left — I gave up on it. I recently started watching again, mostly to see Ducky's "farewell" episode, and it struck me how dumb the show has become. I love Gary Cole, but he's just "when you order Gibbs on Temu" with a dash of goofiness that Harmon never had. But then I've also been re-watching some of the older episodes, and no, the show's always been this dumb. 
