I think you could just try to be a little kinder, humbler, less assuming and open-minded. You're setting yourself up to not consider new information about certain topics, or review previously encountered information without bias.

If you're tired of discussing something, maybe it's fine to just let it go and let someone else handle it. But you come off a bit unapproachable when you bring negative energy into the conversation. This is a place where we can learn from each other, a forum, not a battlefield. Positivity opens minds, negativity shuts them. It's not any one person's fault if you've encountered their ideas before, and besides, you might be wrong sometimes, as we all are.