Slow Speeds Over Tether

[elifx]

I have a google pixel 3 XL and use pdanet for my tethering, so on speedtest I can easily get 80mbps (im not connected to wifi, just cellular), however when using usb c to usb c directly to my motherboard, on pdanet I only get 30mbps max. Now I am not sure about tethering with my actual tethering in settings, I will have to try that, but point is, what could be causing this slowdown, any way to increase speed? When I just had usb 2.0 to usb c I was getting the same speeds, and now with c to c directly to mobo, its still the same, and speedtest is still 2+x as fast.