How to offset gambling winnings from loses for tax filing purpose?

I have won $2000 in casino in California. Casino gave me a w2g form for filing tax purpose. I know that if we claim loses on tax return, we only can claim $2000 loses under itemized deduction. In 2018, the standard deduction is $12,000, then claiming that gambling loses doesn't work for my case because i have nothing to claim under itemized deduction. In this case, I end up paying tax if I file w2g form. But the truth was after I won those money, I continued playing and all lose back to casino including some of the money I withdraw from ATM, too. In this case, I didn't earn any penny from Casino at all. Do I still need to file it and pay the tax? Can someone help me with my case? (I hope I don't have to pay the tax for the money I didn't bring home at all) p.s. this is how I won this $2000. I was using my own money to play the slot machines. When i almost finished losing all of my money Iike about $ 2200 or something, the game suddenly gave me a big bonus, so I won that $2000.