How can I turn it off??

Yes. Create a new wallet without 2FA, and restore your old wallet with your seed phrase.

Quote

Really not fair!!!! They could have told me, or I could get a warning somehow in Electrum!!! If I knew I wouldn't have turned on this shit!!!!!!!!

Don't click "Next" without reading during installation. Electrum's Install Wizard does show it:
Electrum's 2FA disclaimer loading...

The transaction to TrustedCoin address is still unconfirmed. Can I cancel it???

The transaction was confirmed in 3 minutes. Nothing to do against it.