This is really pathetic, and like you said, both you and stake are in the wrongs, someone of your caliber shouldn't be clicking links you are not sure of, not to talk of giving in your details carefreely, I just clicked the same link you clicked, and I noticed that there is a clear difference of the site from the original stake website.
First is that, the link are not the same - always check that
Secondly, it asked me to login, on the same computer I am currently logged in to the original stake website - this is an obvious red flag you should have page attention to, But you ignored and gave scammers the ability to access your original stake account, and i also know that once you login on stake, it stays logged in, and the only time they ask you for 2FA is when you want to withdraw -- i personally think you were just too careless.
Stake on the other hand should have an algorithm in place that would not allow a user to withdraw their funds if they turn off their 2FA until 24 hours elapses, this is how some other platforms i know does it, so this is clearly a big mistake on the part of stake.
And again, I thought users on stake are not allowed to withdraw more than $10,000 without passing KYC verification, how was the new account able to withdraw that huge amount of money without passing KYC verification???
It's really unfortunate for someone to fall victim to phishing scams most especially if they are already spending years of gambling in the same website. However, unexpected things do happen during someone's vulnerable moment like what happened to OP. It could have been prevented by being cautious through double checking, but as he mentioned, it was early in the morning when it happened, and he didn't noticed the unusual parts such as logging once more in the same site. Perhaps because he's still not that fully much aware of his surroundings due to sudden waking up or because he's just about to sleep after a long tiring day.
I guess OP should take this as a lesson learned on his end. I know the amount stolen is a huge amount, but it's almost impossible to recover since most of the responsibility lies on his hands in the first place. Maybe just take this as a tuition for learning through an awful experience so you won't have to undergo repeating the same mistake in the future. To lift some of your burden on your chest, you can search phishing scam experiences here in forum as well to check on their stories to learn a thing or two from them. That way, you won't also feel alone. I did that way back when I experienced a massive loss and it somehow helped me to feel that I can get past through it because there are also other people that has gone the same rough patch.