It seems fairly consistently miserable in any of the common high traffic subs and you have to get down to really niche communities to see what I consider reasonable behavior that matches the behavior of people I know in real life.
Even the premise of deciding who's right and who's wrong is miserable. Most problems are like those daisy-chains of padlocks you see on gates in remote areas[0]: there are multiple factors that caused the problem, and removing any factor would remove the problem too.
There's plenty of those I've read where I thought it sounded like the poster was the asshole and the top replies were NTA.
e.g. If the OP is asking "I ghosted my friend in AA who insulted me during a relapse", Reddit would say NTA in a heartbeat, while the real world would tell OP to be more forgiving.
On the contrary, if the post was "the other kids at school refuse to play with my child", Reddit would say YTA because the child must've done something to incite being cut off.
That’s a nuanced discussion. It depends on what you value most, not what “real world” tells you. Most of the time Reddit would be right, because you need to prioritize yourself instead of continuing toxic relationships.
2) The toxicity is being defined by reddit to give the advice which is mostly wrong as outlined above.
If OPs had a understanding of what they valued and what is toxic, they probably wouldn't need a advice from biased readers [biased in the sense that they're on that sub].
Granted many of the OPs are very biased in the poster's favor. Most I've read fall into one of two buckets: either they want to gripe about some obviously bad behavior, or it's a controved and likely fake story.
Who among us are able to 1) Understand a 2nd persons view of a issue we're in and 2) have the ability/courage to write it in a post seeking advice.
My point is that the author will specifically frame the problem clearly on their side. Occasionally redditors will seek additional questions but rarely.
Many of the posts are A/B tests of a prior post where only the genders were flipped of the OP and antagonist to see how the consensus also flips