My intention is to express my dissatisfaction with systemd, not to get technical support, so I'm not going to list them here. Nothing good can come from doing so. But I will say that in terms of actual pain points, the biggest ones have been around logging.

However, technical headaches aren't my largest objection -- my largest objection is that its getting increasingly obvious that as we move into the future and more applications rely on systemd-specific facilities, it's going to get more and more difficult to operate a Linux system without it.