I joined as soon as it was open. Very quickly it was full of junk TiKtok videos (many with the Tiktok logo). As others have said you have to keep scrolling through the same videos in the same order to see anything new.
The feature that’s missing is some sort of “filter creator” that would enable users to build their own algos.
(To be fair, I can’t see why Tiktok works as an app other than as some global-scale brainwashing tool.)
Check out Memos. It does most of what you want. There’s an app, MoeMemos as well. I’ve used Memos as my journal for a couple of years now. (There’s also a sync with Obsidian if you use that.)