If it is the OS, you could try “systemd-analyze” and “systemd-analyze blame” on the terminal to see what is going on, you can post the output of blame here and maybe someone can pinpoint something strange, or you can search online how to speed up or disable certain elements from the list.

• Not everyone that uses Linux is against proprietary software or only uses FOSS.
• There are people that just heard of Linux, are just trying it out, or have an issue, and already use Reddit, or is what the search engine points them to go for help, or to ask questions.
• Reddit has a lot more reach for the common people than any other platform at the moment, there are still people that prefer to ask on Reddit, than go to a specific forum or another platform to ask (If I remember right, it still happens with some apps like Jellyfin that moved out of Reddit, but people still ask there)

These are just a few of the reasons that come to my mind.