What are the most effective platforms or communities for finding reliable and skilled teammates for online multiplayer games?

Finding good teammates can be tough, but there are a few reliable ways. I usually start with in-game communities or Discord servers related to the game I’m playing. Some players also recommend Reddit threads or niche forums. Recently, I found a post on that listed active groups by game genre—it was super helpful. The key is to communicate well and find people with a similar playstyle.