Yes, you're wrong there (no offense). He's quite popular beyond X (formerly Twitter), particularly amongst the young (~20s) conservative movements. For example, he has almost 4 million subscribers on YouTube and similar on TikTok.
I'd say X isn't even his most popular platform. He's much more popular on video platforms, due to his open campus debates.
I attended one of Charlie's debates this past year and they pretty much let anyone walk up to the mic. It wasn't scripted or censored, that I saw.
that cambridge woman had prepared for exactly what he would say in the same order than he said it and what order he would change topics in. he practiced his script a ton, even if the other person with a mic wasnt on a scrip