I bought my Macbook Pro 15" 2016 and restored the Time Machine back-up of the MacBook 12" 2016 everything seems messed up
Since you have a backup, why not boot to Internet Recovery and reinstall a brand new OS and test things. If there is something wrong with the hardware, you surely can get a feeling of that with a clean install.

The reliable retailer would likely help you if you can show that a clean install causes issues. If the system is stable, you could run Migration Assistant to move things over more slowly than just restoring all the programs and user data. First do one, then the other to see if there was a problem with the migration or just a bad migration.