You said "explain your reasoning", and that's what I did.

No need to get defensive over it and try to pretend like it's irrelevant to the discussion. This is literally the discussion you explicitly asked for. If you don't like the fact that the Republican party has acted in a decades-long effort to guarantee their own power in perpetuity with or without public support, don't get mad at me, get mad at them.

I never disputed Republicans’ attempt to give themselves an electoral advantage. I just disagree that this is consequential, much less decisive. As you yourself argued elsewhere in the thread, NC Republicans’ chicanery could mean a 2% swing in the House. Not to put too fine a point on it, but you’re telling me that by attributing 100% of R success to trickery, in a state that’s the worst of the worst in this regard and so yields the biggest effect size, you can create a counterfactual where Democrats have 2% more seats in just one half of Congress?

Your smoking gun is a rounding error. So I’m asking again: how do these sorts of numbers lead you to believe what you apparently believe?