"To promote the progress of science and useful arts, by securing for limited times to authors and inventors the exclusive right .."
Copyright needs to exist, but we need to go back to its roots.
Everyone forgets that it exists to promote progress. Nothing else. The ability to profit from it exists only to serve those ends.
Anything which does not serve to promote the progress of the arts and sciences should not be protected, and "limited times" never meant "until Walt Disney says so."
The whole "death of the author, plus 70 years" is absolutely insane. It basically ensures that any kind of derivative work is impossible while anyone who witnessed its original release is still alive, meaning that all but a handful of works will have been forgotten and lost. And for what, so that six generations of publishing company shareholders can freeload off an ever-decreasing flow of residuals?
If we truly wanted to protect and promote the arts, we would've stuck to the original "14~28 years since publication".