MyEtherWallet is an Ethereum account wallet generator and it depends on how you protect your wallet keys because when your mew was compromised then it's all your fault because you should be taking care of your private keys at all times.
Never use your keys into public computers or virus infected devices. Or you're going to buy hardware wallet and save your private key on your hardware wallet device so you could delete your wallet and then rely on your new hardware wallet whenever you are going to  access your Crypto asset account.