You're essentially saying that the month you spent is enough for you to call it bad and the creators incompetent.
What qualifies you to make a determination like that?
There is never any actual technical reasons it's always about vague things like not adhering to UNIX philosophy, lines of code or it being badly designed (without any real architectural criticism)
This is an article about why they believe sudo isn't a good system. Where's your criticism of that from a technical / security perspective?
It's been about 10 years since systemd was adopted by Debian/Ubuntu/Redhat/Fedora etc.
Millions of deployments over the years. The companies that build and are paid to support for years with SLAs the operating systems are using it without issue.