I think you need to re-examine the wallet or private key that you use, have you ever entered on an unofficial platform (scams). Because so far no one has been able to hack the Bitcoin wallet. If there really is someone who is able to do this, of course they will aim for a high number of Bitcoin wallets.
And there is no solution for returning lost Bitcoin. If Bitcoin is entered in a centralized platform, then the platform owner can still make a return. But if this Bitcoin address is sourced on a decentralized platform, then Bitcoin cannot be returned.