If the kart is binding, it’s because the inside rear isn’t lifting. You’re taking the correct steps and making the right adjustments to compensate for the track gripping up, but a lot of those changes are counterproductive to getting the inside rear to stay up.
I’ve always found that once you change everything and get real far out of the tuning window, things don’t work as they should. If you’ve made all those adjustments and the kart still won’t work, go back to baseline setup and start over.
And it seems like a cop out on my part, but if you went down one path of tuning and it didn’t work, try making the opposite adjustments and see if they work. Start putting front grip back in and see if that will keep the inside rear off the ground better.