One of the big differences between Web3 and the traditional internet is that you actually own and control your digital/online stuff. Your wallet is your "account" and you can instantly move it someplace else using its secret phrase (or private key).
If you decided Rainbow wasn't for you, then you aren't stuck and there are no hoops to jump through. We don't ever have access to your wallet or your assets... only you do!
On a basic level, wallet apps like Rainbow are simply tools to manage your own cryptographic keys. You can even have your wallet in two places or apps at once.
Once you’re logged in to your Torus/Web3Auth account, click on the menu button in the top right.
Tap on “Settings”.
Select “Account Details” under the “Privacy and Security” section.
Tap on “Show Private Key” to reveal your key. Copy the key and head over to the Rainbow app. You can download the app here if you haven’t already: rainbow.me
On the first screen you see after opening Rainbow, press the “I already have one” button.
Press the button labeled “Restore with a recovery phrase or private key”.
Paste the private key that you obtained from your Torus/Web3Auth account.
Tap the “Import” button.