I was always a PC gamer, and think the old, often modded, independently run servers were much more fun than the soul-less matchmaking I see on most modern games.

Absolutely. If one was lucky enough to have a buddy with a server setup, that was by far the coolest option.

Very true. These things do still exist for a lot of games. It lost popularity a lot on CS due to the incessant need for "competitive" matchmaking, but they are still out there. Rust is a good game for heavily modded servers (if you like the game concept in the first place) and I think Arma (which a bit more niche) is basically all community servers, ranging from in depth military reality to role playing much more mundane stuff.

There's still yet another side to it. Wolfenstein: Enemy Territory is still around today. Boot it up, and try joining a game. Five hours later, the mods finish loading, and you get a splash screen full of ads before you begin playing with bots.

At the time, it felt like there were a lot of hobbyists willing to shell out cash to run their servers, but ensuring you got a fair game low on mods was often more trouble than it was worth. I'm even a little bit grateful that Team Fortress 2 started hosting their own, even if they failed to fix the bot situations.