I will forever mourn the general demise of server browsers. Too many games require you to use matchmaking systems, which means it's very hard to build up a small community in-game anymore. You either have to rely on forming small parties with people you've stumbled upon one by one, or you have to seek out people from some much larger area like Reddit or Discord. It takes a lot of the serendipity out of the experience. Without a small community it becomes much harder to ensure you're not playing with people who make the game less fun by whatever metric you care about.
I used to be an admin on a group of about 18 or so connected Counter-Strike 1.6 servers called T3Houston*. We ran modified versions of various Warcraft 3 mods which added persistent XP/leveling, as well as integration with an external item store and player database the owner maintained. Most of those servers were filled to the brim during peak US gaming times, and our forum was quite active.
There aren't many games these days where you could do something like that. I discovered the community because one day I was just looking for a server with open slots for me to join. I was fairly skeptical of whatever a Warcraft mod would be like, but ended up enjoying it so I added it to my favorites. Eventually I got to know the regulars and joined the forum. Notably, the place felt far less toxic than the average server I'd join back then. I can completely believe this is just me looking at the past through rose tinted glasses, but it feels like the general toxicity has gotten worse at the same time as we've lost a lot of tools to manage it.
* If anyone else here remembers the name T3Houston: hi! I'm Stealth Penguin