I've never got this either. I've been using Linux exclusively for over 4 years, multiple devices, tested dozens of distros, almost all Systemd-based and I havent ever experienced any problems that the anti-systemd folks talk about.
Or at least, they were so rare and minimal that I didn't notice.
Coming from an IT background dealing with 99% Windows machines and Microsoft products, maybe my bar was on the floor, but Linux has been soooo much more stable and dependable than Windows.