Agree with you 110%...used redmi K20 pro lack of support and buggy software. And now using Asus 5z which outperforms K20 pro in real world usage. Superb Cameras(Hardware).Asus needs to work a bit on their software side. Asus , I'm yours .
Try using wi-fi for once and check if it's phone's problem or play store's. Because iam on Android 9 and i faced this problem too...but solved when downloaded using wifi
