I agree with @tree
, it definitely depends on which sections of it you go to.
It's best to think of Reddit not as a single site, but more like MANY sites that just happen to be tied together by the same formatting. The actual content is often WILDLY different from one to the next.
For instance, as you say, I've certainly seen many that are just, well... yeah. "Toxic" doesnt even quite describe them. They are worse than that! But then there's others that are the opposite, like the roguelike page. But that's also a DRASTICALLY smaller one than most, and the roguelike community tends to be a very tight-knit one. Nobody cares to argue politics or any nonsense of that sort there, not when they could sit around trying to determine whether Nethack is better than Angband, or whatever.
I often go to the real small ones like that if I have some questions or something. Like I was checking out the one for Marvel Champions (board/card game I got into) for some strategy tips and rules questions, and it is a pleasant place.
Those big ones though.... blech. I dont know why anyone would use them. I mean good grief, just a GLANCE at any of the big ones makes me feel like I need a shower.