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I know these details isn't a seed phrase, but guess what, your own comments are telling me that I committed some mistakes. That means by your own logic my keys/seed were malware-vulnerable or vulnerable to some kind of network attack beyond my comprehension before I deleted the wallet file. Therefore, if I announce the names of the programs I used, I make it so any malware would target any leftover data I might have in my RAM or whatever.
I respect your opinion and concerns, but I don't see any way that could happen, hehehe
Be careful not to get paranoid about it
Pmalek already suggested a hardware wallet, and for less than $70 you can buy a Trezor and avoid having to take so many steps
Another “easy” solution is to create a bootable USB drive with Tails and generate your wallet completely offline