so my question is
can the casino control the wins and losses of its users?
Not at all, the casino software has already been designed in a way that it will favor them more than the gambler. Casino does not have time to manipulate the outcome of your game, when you just place the bet.
I think it doesn't make sense because 88% luck, then I tried with a new account again and it turned out to win again, finally I withdrew everything and left the casino.
You are lucky, and have made the right decision.
does a new account have a greater chance of winning?
Gambling is based on luck be it a new account or not. My first bet did not work out as expected but was the opposite.