No, my case drains 3%-4% over night. I haven't kept track of it in great detail, but today's the 3rd day since charging the case and I've used the AirPods for hours every day and keep them in the case. Current charge:AirPods battery life when in use has been quite good. The problem seems to be standby battery life. Have you noticed standby at all in your case?
AirPods (after being charged from 45% earlier): 100%
Case: 38%
Not bad at all to me. Apple really shouldn't be having these consistency issues.