There are some good groups, but you gotta dig through a lot of crap to find them.
And literally any Joe can create a group and put out whatever info they want and can boot anyone who says otherwise and nothing you can do about it. There's no way to regulate that. And even if knowledgeable people put out good info, there's no way to regulate the bad info being thrown in as well and heaven forbid you tell someone they're wrong on Facebook. I've left some scaping groups because they allow the bad posts to run amok and you cannot speak up about them without the owners coming down on you. You get tired seeing someone post a bowl with angelfish, goldfish, a betta, etc and not being able to tell the person it's cruel. It's depressing, exhausting, and does no true good for anyone. Heck, I've had my life threatened on social media because I wouldn't give away a molly to someone for a 5 gallon to use as a clean up crew.
And yes, bad forums are out there too. I honestly feel this one has been the best because there's no drama. There's no cliques with the staff, there's no corruption with sponsors, it's laid back and friendly.
Best way to make this forum more active isn't social media, but to make conversation, make posts, tell friends or others looking for recommendations for info or community.
If you're on YouTube and have decent followers, can always leave a recommendation for good places in your vid or in vid descriptions.