I found Reddit to be one of the most hateful communities online. Checkout the Herman Cain award sub if you want proof.
In my 20s I wasted a ton of time arguing about politics and even my own life on that site. While 9/10 times I'd find someone fun, the 1/10 was spent absorbing pure vitriol.
Ultimately no one cares about what I think or how I choose to live my life. No normal person will spend all day trying to degrade others or celebrating another's death. But that's like half of Reddit.
Occasionally I'll still find something useful, usually related to programming. But I simply don't venture into anything else.
For example, most of the specific game subs are hyper-focused on their topic with paper who genuinely want to know and talk about the scene.
Now real examples would be subs like the old thedonald, and the myriad of extremely racist subreddits that are allowed to exist unchecked.