Some are toxic, some are cliquey, some are too established to do anything in. If it isn't a PvP game, odds are you missed the boat if you don't hop on in the first 1-2 weeks of its introduction (or for MMOs / games with long lifespans, a major patch), or you have to really stand out in something (skill, fanart, whatever).

I like games, but the ease of getting into a community is nowhere near as low as some people like to sell it as. Especially today. Even if they aren't toxic in the obvious sense, it often feels like a minefield navigating these communities without upsetting someone, getting dogpiled or anything.