Republicans got blown out in Wisconsin and yet lost one seat in the Assembly. This is exactly what the case that went before SCOTUS was all about. Republicans have totally insulated themselves from being held accountable by rigging the elections, leading to majorities so calcified that it would take a historic wave election (for WI) to dislodge them. But apparently this issue is going to be non-justiciable, because yes this is all perfectly normal and is how true democracy works.
/rant
How much of that is due to gerrymandering vs Democratic self-packing Virginia? In the Bush/Obama era one would expect the GOP to win a 50/50 race due to the Democrats running up the margins in their strongholds while the Republicans would have comparatively muted margins in the burbs and rural areas. Wisconsin is an interesting case of this because you get two very different packs; one in Milawaukee and another Madison. Obviously this effect is starting to disappear in states like Texas and Georgia but Wisconsin is the sort of place one would expect it to hold up.