Here's an overview: The Odds of Winning Blackjack: The player has about a 42% chance of winning a hand, while the dealer wins around 49%. The remaining 9% percentage results in ties (called a push). .
So you say the house edge is 49% losing a hand minus 42% winning a hand = 7% house edge?
My friend, 9 percent is push; don't you read the end of the sentence? You are destined to lose in blackjack, this is not special to Stake.com.
I even wrote this myself but this guy is just a joke. Not only is he unable to read but also simple math seems to be a big issue for this person. Having played 180000 hand of BJ (so he claims) and doesn't even know the numbers is just insane.
Casinos love players like him obviously. Absolute clueless degen that deposits and whine at the end.

I don't know what to answer anymore to the OP; you have also mentioned the push factor above. But, I honestly believe that he is in a
mind-state that Blackjack is a game found to bankrupt the casinos not the players.
I am still waiting for OP to actually cause Stake.com with numbers. I will support or oppose it then. I don't understand what is the accusation here?