Yes, Tildes is great, it is also a non-profit. The creator of Tildes, Deimos, also used to work at reddit and modded some of the better subreddits.
As an aside, the site is currently down for some updates for the first time in at least two years. Virtually 100% uptime, incredible.
I all but completely gave up on Reddit for my own posting a couple of years ago, following an early set of "features" that I'd categorise more as "contemptuous" than "disprespectful". More deeply, Reddit simply isn't very good at fostering conversations. It does have depth, and there are communities which I'll still visit, very occasionally.
That said, it's been a slow death for most of the past decade, no matter what the KPI stats are claiming.