content: he made an init system called systemd people hate it because he's taking all of the very core and crucial components of the existing linux system and jamming them into systemd rather than just leaving them as independent programs, like how the Linux system was supposed to be from the start basically he's got a monopoly of what's happening in the linux dev land, and many linux programs are starting to require systemd and all the asinine changes it's making. basically "take our shit or leave linux" At least, that's what the internet says about it. It's probably not that bad.