It sounds very much like both the wallet file and the seed phrase you have are in no way connected to the addresses you have been withdrawing bitcoin to.

In addition to the advice above regarding searching for other wallet files on your computer, do you have any other seed phrases or back ups you could try? And are you certain you never used a passphrase? You might have added one while mistakenly believing you were simply adding a password to your wallet file.

Where did you even copy the addresses to withdraw to in the first place, because it doesn't seem like they came from this wallet.