Gerrymandering works by packing a bunch of opposition voters into a few districts, so as to make the remaining districts slightly safer for the majority party. So the "punishment" for opposition voters is having a congressman more to their liking than the one who would represent them otherwise.
And considering three of the North Carolina districts are listed as competitive on Cook and Sabato, I do not think legislative redistricting is the all-powerful tactic of totalitarianism that you think it is.
Competitive maybe because many believe we are in a wave environment that is anti-GOP to the tune of 10-12 points in the House PV, which would be a huge blowout. In a neutral environment, or even only very modestly anti-GOP, NC's delegation would be 10R - 3D. The current environment is not normal, and just because a district may be competitive in a way doesn't mean it isn't still gerrymandered.
I know what gerrymandering is and what tactics that they use to achieve their goals. I mean, responding to me, and telling me that a 10 - 3 map in what is basically a 50/50 state (ok, maybe like 51R-49D, give or take) is fair or not egregious is laughable to say the least. That is the entire point, and it's a similar situation in a number of other states Republicans drew the map in. Take Michigan for instance, where in the state House, Democrats won the popular vote by 8 points and didn't even come close to a majority. If you think that's just dandy, then sure, but you are in the minority, and I don't see what the point of arguing this with you is. This is a pretty cut and dry case of subverting the fundamental design of our system.
If you're fine with a system that allows politicians to insulate themselves from the will of the people in all but the most exceptional circumstances, then all I can say I guess is that I'm glad it's not up to people like you.
This is not to say that I approve of gerrymandering. Districts ought to be as contiguous as possible, mostly reflect county lines, and completely disregard race. But I cannot pretend that deviation from that is unconstitutional just because I do not like it.
There are plenty of instances where the state is granted certain powers but can't abuse it any way they want without running afoul of the constitution. SCOTUS cracking down on gerrymandering would not be much different. It's just way overdue.