There are some good subreddits out there. r/experienceddevs springs to mind
The tricky thing with reddit is that it's algorithm tuned for a daily churn. A small sub, like the one you mentioned, may only have a couple good posts a week, but you will miss them if you don't check every day.
If you only browse the frontpage of your subscribed subreddits, adding any popular subreddits tend to drown out the smaller ones.
- Multireddits—you could put ‘slow’ subreddits into a multi that you'll check separately.
- RSS feeds, if they still work.