What are you talking about... the audio might not professional studio level 10/10, but I don't see anything significantly wrong with it - given that its more like a standard presentation mic. Its clearly good enough.
Every time he turns away from the mic and continues talking while looking at the projection his volume goes way down and at best sounds like a mumble. It is very taxing to keep up with him when he's turned away. It's the wrong mic for the task.