I'm 100% with you, re Mary Queen of Scots; can't stand her...never could! And the cloying crap written about her, as well as the stupid movies all STINK ON ICE!
No, no movies nor series about Elizabeth I, IIRC, portrayed Mary as a stellar person and she absolutely wasn't one.
When I saw Schiller’s Mary Stuart in London with Janet McTeer, my friend Rodney said afterwards: “Well, you can see why Elizabeth offed her.” Even Janet McTeer couldn’t make her sympathetic.