This person has not met Apple users. Windows users that do PC gaming, use pirated software, use good antiviruses (Kaspersky, ESET, Bitdefender), or have to modify or purge the bullshit in W10/11, often can know more even compared to most Linux users that are these days just adopting it for "MOAR performance" or ease of use with Flatpak+Steam+WINE or low malware.
Apple users on the other hand are some of the most tech illiterate users that also happen to be an incompatible annoyance to rest of the 95%+ Windows/Linux/Android users.
It's possible that compared to the way the OP regards the average Microsoft user, they might just consider apple users more like monkeys at a keyboard and felt no need to mention them.
Being pedantic, but OP is merely the sharer of the reddit user's take.
Although the point can seem to be missed in what I say, that the reddit user is making here - Microsoft merely made complex computing extremely accessible with an incomprehensible amount of backwards compatibility to this date. Everyone cannot be pleased, and we happen to be that group that can learn and take care of ourselves, unlike the tech illiterate users with no interest in computing. I doubt that humanity would have done any better if it was someone else instead of Microsoft, and even as a socialist, I can acknowledge the insane level of condensed advancements we have made due to roughly 20ish years of specific products (Windows, MS Office) made by these ultracapitalist tech corporations is helping shape the future planning of society and tech.
OP has a meaning highly dependent on context. Sometimes it's referred to as the top comment, sometimes as the post author (though that's the most common), and sometimes as whoever wrote the actual content of what's in the post.