Much like the show in the latter years of its first run it collapsed under the weight of its own canon, and writers/showrunners that enthusiastically embraced that canon and alienated the casual audience.
IMO they should never have brought back the Time Lords. That was the genius stroke of the 2005 reboot. Just make the Doctor an intergalactic oddball, let the adventures run from there. What's weird is that Russell Davies was the one who understood this... then when he came back to the show he shoveled nostalgia on top of nostalgia and sank the thing.
I never even watched the Chibnall era so I'm not fully informed but from reading about the Timeless Child arc it just sounds like a show disappearing up its own arse. It's supposed to be a family show, younger kids don't care about that kind of stuff. Just make it fun.
I liked the regular season that followed too. It had good and bad episodes, just like the last time RTD was showrunner, but the good ones were very good.
(I haven't watched the most recent season yet, but that's less because I'm unexcited and more because I want to save it.)
What killed it for good was what came (back) after. Bad decision. Bad precedent set. Bringing the RTD and Tennant gang back was the single most important and devastating mistake ever made on this show.
In all seriousness we clearly have very different taste! I just found the Chibnall episodes boring. I wanted to like them!
I think GGP shares my taste though, based on their comment.
But yes, the moon suddenly reappearing in between shots, perfectly fine and identical to before, was very silly
Capaldi was a great actor and it was nice that he got some good scripts (I really liked the one where he was in Doctor Prison, great concept), but his run felt to me like a show running out of ideas.
I didn't watch the Whittaker doctor. Heard it was awful and wasn't surprised. I eventually saw the pilot and it was indeed, awful.
Also implying that the wheels weren't kinda getting loose when 10ant said his final farewell at that (otherwise fairly underrated IMO) episode where the Master was hungry.