I worked at reddit for 4 years, but quit in 2016, largely because they were clearly beginning to switch from a small, fairly independent company (despite being owned by Advance/Conde) to one that was going to become completely dependent on venture capital and I knew what that would end up doing to the site.
A few months later, I decided to start a non-profit and start working on a site that would be able to address a lot of the issues that I think are hurting online communities: https://blog.tildes.net/announcing-tildes (HN discussion of the announcement here: https://news.ycombinator.com/item?id=17103093)
It's in private alpha and is still fairly small, but it gets several hundred posts/comments a day and is progressing steadily. If you (or anyone else) is interested in an invite, send me an email at the address listed in the blog post and I'll be happy to give you one.