If a broadcaster is not very good at speaking English, you can say that they are "not fluent" or "not proficient" in English. You could also say that they "struggle with" or "have difficulty with" speaking English. It's important to be respectful and not criticize someone for their language skills, as it can be challenging to learn a new language. If you want to give constructive feedback, you could try saying something like, "It looks like you're still working on improving your English. Keep up the hard work!" or "I know learning a new language can be tough. Keep practicing and you'll get better over time."
