Myetherwallet is the most common and easiest wallet to use. The only problem of all wallets is that you have to keep the key safe, because when you let others know, you have no way to change it.
How can you find it that keeping your private key safe is a problem? same comparison for those people who are keeping their money on the bank is also a problem with that logic. Being responsible with your private key is what an holder shall do.
You have the best wallet but you are not careful with your seeds so its useless. Keeping your private key safe isn't a problem but it must be done by every individual that's into crypto not only for Ethereum wallet but it's for all wallets.