Why do you think Austronesian languages are so annoying to me?
I'm not sure. Tell me what part of it you find annoying.
I honestly don't know, just hearing them pisses me off so much.
Everyone has certain things that annoy them but entire languages? The way you described it you have a literal hatred for them and that's not okay. You might want to get some help because it sounds a lot like misophonia.
Its not really a big deal like that.  I just don't put people in charge of doing stuff for me when they speak that shit.
That sounds like a big deal. Refusing hire someone based on the language they speak is close to racial discrimination. You could be breaking a law by doing that.