You have a couple variables with the gd razor. Is it your stropping, is it the razor was poorly honed or is a one that due to poor quality wont hold an edge.

A vintage would be a much better option a take out some of the razor doubts. That said there have been multiple times people have brought up the site you brought from and I haven't heard much favorable about the razors yet so maybe do a search and see what you can find.