Do you know perhaps what is your connection speed (use speedtest.net if you dont know)? And was it happening before or just lately?
It could be that you are in the middle of nowhere, distant from the most servers which causes the high ping on them.
I know that it happened occasionally that all servers were high-pinged, but it just disappeared by itself after some 24hrs. If it stays, its probably your connections fault, but dont take that for granted.