That same paintbrush also applies to those who denigrate people who have problems with systemd without putting forth the effort to see their point of view.
The top comment on this post is a great example. People have been giving well reasoned arguments against systemd for years, yet the first and most upvoted salvo in this article is "I have yet to see a well reasoned argument against systemd".
The hate for systemd gained steam when people stopped listening to well reasoned arguments because it also provided parallel startup and unit files, and really hit its stride when the developers ignore legitimate bug reports as "working as intended" (the latest numeric user issue is but the latest in an established history of such issues).