Because they impose a middleman between the application developer and the user. I don't want a middleman, I want to get my programs from the developer, and sto

Because they impose a middleman between the application developer and the user. I don't want a middleman, I want to get my programs from the developer, and store them using the tools I know (regular files on a filesystem). Are package managers easy to use (most of the time)? Yes. Are package managers (as they exist today) a universal, well designed way to distribute software? No, because they impose a middleman.