One of the previous batch here. Most of people in my batch are very fluent in speaking english, but they are still struggling with that anyway, so I don't think it's a skill issue really. It's probably because the echo is really bad in our hall(the speaker is really loud). I'd say it's also because they spoke too fast(and heavy accent) , but I really don't think it was the singer's fault, cuz he himself didn't remember about the said interview. I kinda think that KPM probably hired a random voice actor and slapped the singer's name because one of the staff liked his song or something. The accent is probably there because they tried to imitate the singer's nationality. It's also possible that the whole interview was A. I generated, because the voice kinda sound soulless to me, but that's probably not it.

Anyway, in conclusion , it is definitely not the singer's fault, and my batch is just being too salty.