It seems like a lot of people complain about Doctor Who not really having any canon or rules, and contradicting itself constantly (sometimes within the same episode) but I don't think that's necessarily a failing because it's not trying to do that at all.

The trend these days is for a lot of shows, especially sci-fi ones, to be sort of 'internet-proof' and be designed to withstand the people who go through frame-by-frame looking for little errors and contradictions to pull apart, and Doctor Who ignores that completely and just aims to be big fun campy dramatic nonsense, which I think it mostly succeeds at. I think the only cardinal sin for that show is don't be boring, which IMO it pulls off more often than not.

And it's fine to not like that of course, but I don't get it when people try to call the show out for not doing something it's never really tried to do, at least since it came back in 2005.