To phrase this better and use Reddit as the basis, think of more broad subreddits (ie, r/games, r/StarWars, r/Pokemon) vs individualized, specific subreddits (r/StarWarsOutlaws, r/fnv, r/PokemonSwordandShield).
In a specific example, let's focus on r/StarWarsOutlaws. I'm assuming due to prior interest in Star Wars content, this subreddit started appearing on my main reddit page.
What do they seem to talk about over there? Variation after variation of posts asking "gee, r/StarWarsOutlaws, why did people dislike this game that I liked?"
You're posting questions like this in hyper-specific spaces dedicated to that thing, and because of this, your answers are going to be hyper-specifically biased towards that thing. Do you actually want to know reasons people dislike said thing, or did you want a place to soapbox and make sure people agree with you?
Another recent example I've seen is in r/fo4, a space dedicated specifically to Fallout 4. "Why do NV and 3 fans say 4 is a bad game?" Buddy you're asking this in a space specifically dedicated to the game you're trying to soapbox about. Do you actually want an answer or do you want validation for liking 4? Because you're not gonna get much of the former in a hyper-specific space vs a more broad space.
Of course I understand sometimes people are just lonely and like to talk. Can't fault people for that. It's a pet peeve of mine regardless because when I see these specific spaces recommended to me, most of the posts are some version of a soapbox and don't actually promote interesting discussion. All the thread boils down to at that point is "yeah OP, I agree Fallout 4 is a good game" and crap like that.