systemd gets flak because its the only one adding features and therefore the only one in the news.
When was the last time sysV got a new feature? Probably a long time ago-- not in the news. People forget about it.
When was the last time Upstart got a new feature release? Not recently. Last time I saw a news posting on phoronix about an upstart feature release was about a year and a half ago.
When was the last time OpenRC got a feature release? I couldnt even tell you because I dont see it in the news AT ALL on ANY site.
When was the last time systemd got a new feature release? like a week ago.
All four systems bring up init just fine. But systemd is the only one thats actually moving forward. (You can argue that its moving in the wrong direction, but atleast its MOVING.) All the other projects are sitting there twiddling their thumbs.