Proprietary software is based on purposely hiding important information that affects the lives of people. I find this behavior appalling.
Copyright and patents on inventions are perfectly OK in my book. They are based on spreading the relevant information, not on hiding it. (However I loathe patents on theorems and algorithms.)
Proprietary software not only hides what it's doing from its user, DRM has all sorts of problems and could even damage your data/hardware, not to mention exfiltrate all sorts of information in the name of 'enforcing IP'.
Copyright and patents on inventions are perfectly OK in my book. They are based on spreading the relevant information, not on hiding it. (However I loathe patents on theorems and algorithms.)