I like going on YouTube and hearing to what people like Late Kick, uncle Lou, and voice of college football have to say. In the live chat there is a lot of interaction, trash talk etc.
I don’t have any other social media besides this and YouTube though
I know you said reddit alternatives, but I love the CFB reddit. Lots of level headed discussions. Have you also checked out Utezone? I think you need a subscription to join their discussion board though