Unironically WeChat's moments are probably what you're looking for. - They don't embed ads in moments. - It's a chronological feed. And you only see posts from your friends (who you allow to view moments). - You can set the expiration time of your moments (so no one can see anything older than 1 month, 2 weeks, 1 day (I think?), And keep them visible forever if you want. - You can only view comments from your friends…
They have a ton of powerful privacy features, but the issue w/ them and most, is that they're all off (i.e. public) by default.