He is frustrated because he could not score a goal on that match Sometime players need to do what he did to break their opponents concentration, but he did it too bad...
One thing that's always made me laugh about Costa is that his 'registered' age is 26. Take a look at a few photos of him or the next time he plays & see what you think his real age is.
No way is that guy 26, I know he plays for Spain but he was born & grew up in Brazil. Do you think it was such a poverty stricken area that they don't register birthdates properly
It happens a lot with African footballers, it's unusual in Brazil though.