Patience, this is the public internet, where nobody is doing marketing to create conversations, that is a huge change. There are a lot of communities right now (and more than 5 million of users), if you don't find content is partially your fault
I like simutrans a lot (maybe the most elaborated TTD-like transport game), and I am trying to learn freeciv, but it is a bit "technical". I also like minetest, I have constructed a lot of big houses, the only FOSS game where you can cook a lot of recipes.
Patience, this is the public internet, where nobody is doing marketing to create conversations, that is a huge change. There are a lot of communities right now (and more than 5 million of users), if you don't find content is partially your fault