... He helped my create my two accounts...local bitcoins.com and Blockchain.
At this point, he had your backup seeds/phrases and could effectively "clone" your wallets whenever he felt like it. Effectively, he had access to ALL your private keys!

You were totally compromised before you deposited ANY coins.

I changed my passwords as he directed....
This would have done
nothing to stop him. As he had access to the backup seeds/phrases, he could regenerate your wallet and spend your coins without needing your password
he said he was connecting my wallet to his atomizer or miner...something like that.
*cough*bullshit*cough*
