People get hacked all the time, only a few are able or willing to come and share their experience. As soon as your private keys or back-up phrase are compromised, you are doomed. Personally, my bitcoin got stolen on a staking platform simply because I had not activated 2FA security verification. This experience has made me to activate Google Authenticator verification on all platforms wherever it's applicable.
Indeed I experience the same thing last time, and it is a terrible experience, I think my eth got stollen in a wallet that can link with your previous eth address, I downloaded it in play store and it is legit because it has a hundred thousand to million downloads so far, my private keys are safe, I never log in my account in anyone's pc or laptop and but after mins after I received it (I am sleeping this time) it is automatically sent to another wallet, now the price of eth is so big I am more sad realizing it.