Drop me a mail in Trust if you get stuck mate, as there's only so much I'd want to say on here publicly. Basically if you're on the Windows client tick the box for port forwarding in the Advanced menu.
Then when you connect (it has to be Netherlands for forwarding) you'll get a tooltip popup over the little green icon by the clock whenever you hover your mouse over it. Usually it simply says PIA - connected or similar (I'm on Linux so going from memory from when I had a Windows box). But once you've enabled forwarding that'll change to PIA - Connected (82376) with that number being the forwarded port. Then it's simply a matter of forwarding the listed port in your router to point to your desktop.
So if you're on LAN IP 192.168.0.2 make that static in the router so you always get it, and then forward port (whatever) to that IP. It's easy and if you don't know how to do it then
PortForward.com will give you a walk-through guide based on your exact router model.
You should see much better speeds after that, and connecting over TCP instead of UDP (again in Advanced) can help too if you're still not seeing proper speeds. Make sure in your torrent client that you have NOT ticked uPNP, NAT-PMP or similar. But DO ensure you enter the port that the PIA app gives you as your only torrent port, and tick to use the same port for peer connections (DHT, PEx) and trackers.