You didn't mention what make & model compressor. Many small or inexpensive compressors don't deliver much air at high pressures and it can take forever to add much air in the uper pressure ranges. It is unlikley there is a problem with the tire valves if you can get 70 pso in, so the problme is likely the compressor or the air chuck on the hose.
Do you have something else you can test your compressor on, something that can handle 85-100 psi?
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL