Have you tried mastodon?. Imagine Mastodon, but with a bloggy/(2008's facebook) vibe instead of a twitter clone.
There would be no ads, because it's decentralized, just like mastodon. The feed would be chronological, and the interface would desincentivize spamming (links wouldn't have thumbnails or previews).
The idea is to make a clean and simple blog interface with a profile section added, where you could put some contact information and a profile pic.
In fact I made a little preview of what I would like it to look like. What do you guys think? https://i.imgur.com/DSD1wE0.png
The only problem I have is about once every few weeks someone wants me to Skype/Hangout/Facetime/whatever-the-other-video-chat-options-are. I really wish video chat was handled by telecoms in the same way phone calls are. Standard and ubiquitous.
Unless WhatsApp ever charges money. That would get people to move.
Sorry to burst your bubble, but I am an European, and I have never used WhatsApp.
Also, from what I have read, WhatsApp is very popular in UK political circles (MPs, SPADs etc.).
They're still using Facebook, just one of its other shapes.
But how are those not also vendor lock-ins?
For me, and I don't think I am unusual in the US at least, texts to anywhere outside of the US, Canada, and Mexico aren't allowed without paying extra. Texts to many countries aren't allowed at any price.
I can text literally any phone number, given I have enough money booked on the account. SMS is by nature not centralized, the data is exchanged between mobile providers.
If you were to start your own mobile provider, you could text anyone everywhere given you manage to get peering.
I guess this leaves email, SMS and IRC as the main remaining options.
Somehow this needs to be communicated to the general public, but I don't have the slightest hope that this can be solved.
The future sucks.