darkwillow
Explorer
I don't think Michael Burnham was a mary sue, plenty of flaws, even if being a criminal was a little far fetched.I can only think of two characters in movie/TV history where this has been applied to:
The female character in Star Wars (I didn't watch as I never had much faith in Disney) and Michael Burnham of Discovery, whose character I personally disliked. Have there been anymore?
The reason I ask is because you state it is lazy criticism which implies this term has been utilised a lot.
The most obvious one was Captain Marvel, who is unbeatable, perfect, succeeds at everything, and is identical at the start of the movie and the end of the movie. Contrast with Thor or Irons Mans character arcs, or Ellen Ripley, Sarah Connor.