I read it once and couldn’t find the post again, but I managed to find some stuff:

The kernel hack was in 2003:
https://lwn.net/Articles/57135/

There is no official communication between the NSA and Linus Torvalds. In 2013 when he was asked about a Linux backdoor for the NSA and said no while shaking his head yes, it’s officially considered just a joke
https://www.youtube.com/watch?v=7gRsgkdfYJ8

Later that year his father mentioned it again… is it an official hearing? It seems like they are also questioning people from Microsoft, but I didn’t find info on that:
https://www.youtube.com/watch?v=wwRYyWn7BEo

In 2022 a lot of information about Bvp47 came to light, a Linux backdoor NSA was using for more than 10 years - I didn’t find any info about this exploit being possibly because of systemd or not.
https://www.bleepingcomputer.com/news/security/nsa-linked-bvp47-linux-backdoor-widely-undetected-for-10-years/

Red Hat introduced systemd in 2010. My info about it being a subsidiary of a Big Tech was incorrect and I removed from my original message. It was only bought by IBM in 2018.

From what I heard, people hate systemd because Linus Torvald was approached by the NSA to create a backdoor on Linux, he said it wouldn’t be possible to change the kernel because there were too many eyes on it, there was a mysterious hack of kernel.org introduced a mysterious code but it was spotted and removed… well, what was the only other thing common to all Linux? The sysv-init, but it was too small, too tight, too specific for them to create a backdoor there, they needed something big, bloated, doing way more than it should do, like it was just supposed to start the system but it can also do unrelated stuff like handling DNS, and an American company shows up bringing systemd, that solved all the problems the NSA had to create a backdoor on Linux, and all distros jumped into the honeypot :)

I use my cellphone only to message relatives and play some MP3s. It’s a Samsung J2 Core I bought in 2019 because it was the cheapest non-second-hand smartphone I could find at the time. Its last security patch was in 2021, and they dropped support. It’s barely compatible with the current Google ecosystem, and I’m probably getting locked out of it anytime now because apps will refuse to work… even LineageOS, which supposedly increases the life of smartphones, doesn’t support it… I’m sad I’m going to have to spend money on one of these sometime soon even though it’s still working.

A Roman dodecahedron, it fucks with modern people as well.