As the post is important, it can not be so big.
It is better not to enter today's Etherwallet without much fanfare.
However, if you need to, if there are some reductions, after all the cuts, then cut all and then enter.
I'm pretty sure the etherwallet has been hacked.
I guess we are confused a bit and all of us got scared a bit and checked our accounts but the most likely explanation is the OP getting hacked instead of etherwallet getting hacked totally.
I mean I had the same thing, I once downloaded a free VPN so I could access to websites my country bans but in the end that vpn apparently both mined crypto on my pc and also hacked my metamask wallet, thankfully I was capable of deleting the extension and things it left behind for mining purposes and my metamask only had like 1 dollar or so in it left so it wasn't a big deal.
When you are using wallets you need to be careful about what you download and how much you trust the things you download, if you download risky things there is a big chance your wallets can be accessed and keyloggers could be used to just empty your wallets.