The only "purple red" states where Dems have been bailed out by a state supreme court is North Carolina and Ohio...literally just two states. You're just hyper-focusing on those states because you have a conservative victimhood complex but you're ignoring the purple-red states (Florida, Texas) and flat out purple states (Georgia, Wisconsin) where the GOP essentially has full control of the process.
If the GOP was actually as handicapped by redistricting as you're pretending it is, then it would have wanted a federal ban. The reason the GOP doesn't want a federal ban is because it still benefits more from gerrymandering than Democrats do, it's just not as lopsided of an effect as it was in 2010.
Elections have consequences. Democrats made a concerted effort to start winning state supreme court elections around 2015 and as a result picked up control of the supreme court in NC, PA, MI and OH. That's not a cheat code; it's no different than how the GOP focused on winning state leg control in 2010 for a redistricting advantage.
Basically you're just butthurt that Democrats beat the GOP at their own game by pouring resources into winning important court elections that have major redistricting ramifications. The re ed part is that the state supreme courts aren't drawing unfair maps, they're putting proportional maps in place that are similar to what you would expect from an independent commission. It makes no sense that you're more offended by a state supreme court imposing a fair map than you are by a state legislature imposing a hyper-gerrymandered map.
The GOP is going to pass the exact same map it would have passed before. The veiled threats about how the GOP might take the gloves off if the Democrats don't let them do whatever they want are hilarious and stupid. After 2010, it's pretty clear the GOP is going to gerrymander as much as possible whenever it has the power to, particularly the North Carolina GOP which is known for its ruthlessness.
You're also ignoring the states that have full Dem control (Washington, Virginia, Colorado and California) where the Dems disarming themselves probably costed us 10 seats in congress. Name me one instance where the GOP disarmed itself (and no, Missouri choosing not to crack KC because of selfish in bents isn't the MO GOP disarming itself).
if you think the NC GOP would ever draw that map. They'd much rather create a Charlotte sink district than make 4-5 more districts that are compe ive. The NC GOP's map that the court overturned is the same map it'll use if the NC GOP wins control of the NCSC in 2022. There's no downside to the Dems using power while they have it. You're also wrong about Charlotte; any district that's majority-minority, even if non-hispanic whites have a plurality, has some level of VRA protection. North Carolina is also a 4th circuit state where the circuit judges are very friendly to Dems in VRA lawsuits; they would need to rely on SCOTUS to gut the VRA in order for them to dissect Charlotte, and it's just not worth it.