Exact same issue here.
Andriod. Device: Honor 90.
Since April experienced multiple crashes daily. Got into a rhythm of uninstalling and reinstalling each day and before TW (crashes seem to happen only once whole 600MB+ is downloaded).
As of today, I can't get past loading screen - followed all the info (clear cache, restarted phone, uninstall/reinstall 10+ times).
Point of interest: I can get into a new account, it's only once I reconnect to my google play account that I get stuck consistently.
This has taken an insane amount of time and data for 2 months now and is shocking for a billion dollar game.
Advice I was given was to use another device which would probably get you perma-banned for account sharing...
Allycode: 825-291-935