Childhood is when you idolize Arthur Conan Doyle.
Adulthood is when you realize Agatha Christie makes more sense.
They're both ridiculous hacks. if you want a good detective story you need to go to Hammett or Chandler. Christie writes things that are insulting to an audience's intelligence.
Like, reasonably good fun for a silly summer holiday read or something but in terms of being qualitatively good, no way.