Reddit was a sort of interesting place circa 2006, when it was made up of mostly nerds in the bay area and boston, and was filled with high-level technical conversations, so you could at least learn something while you were wasting time looking at it. Since their goal was to increase their audience without much concern for the direction of the community, within a couple of years it became totally unfocused, catering increasingly to shallow clickbait. Culturally, Reddit is pretty much like network television, strip-malls, and suburban sprawl: an endless sea of mediocrity.
The mechanical keyboards subreddit, more specifically, is a little fiefdom run by a narcissist, but who cares? Most of it is newbies posting pictures and looking for validation; I think it’s fine that it exists in its current form, it’s not doing any harm.
I don’t think reddit, based on the way it functions, is a useful host for a more permanent or serious community. As a rule, most people on reddit aren’t having long-term conversations or building relationships. Everything there is quick and transient, which is why pictures and bad jokes predominate.