But yeah, any good will from series 11, including its most successful element of going back to basics, was shattered with The Timeless Children.
Well, that's an overstatement. I'm not one of those people who'll act all melodramatically betrayed just because a story goes in a direction I wouldn't have chosen. Life is about adjusting to things that are less than ideal, and you can disagree with some of the choices in a story but still find other merits in it. This is the way Doctor Who is now, so I'll adjust. It's changed and redefined itself many times before, and it's the changes that keep it interesting, even granted that it occasionally changes in ways I'm not crazy about.
Plus, of course, I haven't even seen the most recent season yet, only heard about it. What a story does is generally less important than how it does it. I may not have liked Moffat's tendency to make the Doctor the center of the universe, but the actual execution of a lot of those stories was inspired, and I enjoyed the stories even when I wasn't crazy about the underlying approach. Will I enjoy "The Timeless Children" when I finally see it? That remains to be seen. Hopefully the execution will be good enough to balance out my issues with the concept.