One of the things that always stands out for me in maps made using Artifexian's method is the complete lack of Dfb, which should make up a sizable fraction of the mid-latitudes. His method also tends to put deserts (and to a lesser extent, steppes) really close to ocean-facing east coasts, which is something that doesn't happen all that often on earth as oceanic moisture tends to penetrate farther into continental interiors. Without digging too deeply into the details, those are the first two things that jump out when I look at this.