Wi-fi and Audio issues with z370

I recently purchased an ASRock z370 for a computer that I built. I got everything installed correctly and working, but I'm having two issues.

1. The wi-fi speeds are really slow, even compared to my business baseline laptop. I feel like they should be faster for what I paid for this motherboard. I disabled the blue-tooth devices, and that brought them up a little bit, but they still seem slow. Can anyone help with this?

2. When I go to install the realtek audio driver, it tells me that there are no supported devices. I was under the impression that this came with Realtek audio.

Any help is greatly appreciated!