Using the character’s name is not simply remaking The Hound of the Baskervilles over and over. The recent TV series is both set in the modern day and has 154 episodes, that’s mostly reskinning a detective show not copying decades old scripts.

I don’t mind the idea of The Hulk fighting Godzilla or whatever, I get annoyed when the major blockbusters are rehashing old scripts.

That won't change. The movie studios are currently not capable of good writing.

Even when they follows some book, the moment the movie abandons books quality of writing takes nosedive. (See Game of Thrones, Witcher for prominent examples).

The studios just don't know how to write.

Plenty of good movies get made. It’s the compromises they need to make when aiming for blockbuster billion dollar revenue movies appealing to everyone globally which results in movies that suck.

A little pandering to the Chinese censors and nothing really offensive to anyone else etc.