How can hacker hacked my wallet this time where I created totally a new Address.
The first thing that comes into my mind is that your laptop has some malware on it, giving to somebody else some of your data - maybe what you type or the content of your screen.
Another idea would be that the clipboard is intercepted and you've sent to hacker's address believing you are sending to your own address - this can easily be checked.
Both cases we talk about a compromised computer that has to be cleaned.
This is the most possible reasons I can also think of. If you have more than 5k USD before, you should have invested on the security of your coins. You should have bought some hard wallets like ledger or trezor. Security should be the priority of every crypto investors. Maybe your wallet have been hacked. Start moving on and I hope that you've learn something from this experience.