It wasn’t a language barrier issue though. And his English isn’t clumsy. It's that the actual content of what he said was ridiculous. It reminded me of the kind of BS Adam Neumann would say.

For what it’s worth, Jack Ma has a degree in English and taught English at a Chinese university.

Chinese unis don’t have the best reputation, but I would expect him to be able to speak the language decently well at least.

No. He makes himself understood quite well. It's just that what he says is stupid.