Welcome!
I would agree with you in general, with the exception of Shawshank Redemption and The Green Mile which were both quite good in their own way
Quite true and both those movies had some stellar performances of some great actors. The Shawshank Redemption is probably one of the few exceptions in which (at least to me anyway) the movie was slightly better than the book. But the Shawshank Redemption remained relatively faithful to the original source with a few tweaks here and there.