Because he is dumper than a piece of shit and has the charisma of a rotten banana.
Not exactly who is dumber; but by your post, you take the cake.
Ronny is German, and with every question the girl asked him, he's translating in his head. On live TV, that's not easy, and you can tell that Ronny cannot speak English well anyway.
He's charismatic, but just can't speak the language, so he comes across as uncomfortable.