No, I am a dedicated systemd hater ever since I spend over a month full time writing and debugging systemd services for work. Systemd (the init system) is just all around badly designed and executed, I have very little confidence in the developers and their technical abilities and their tendencies to expand into completely unrelated areas for seemingly no reason makes me quite concerned.
I wouldn't blame the xz exploit on them, it is very hard to call it their fault in any way. But I do think it is a symptom of a system which has grown far too thin and wide.