That is actually the main problem of every gambler, being greedy is really hard to escape. You have tried indeed, but there is really something inside of you that still wanted to continue even after losing so much money.
You should have had more control over yourself, you can bring back your losses by doing trading but that is not the case. You should have realized that gambling is just for fun and not to be made as an addiction.
This is a piece of friendly advice, do not vision a goal or a target to cover your past losses.
Keep on playing, that's fine, but you should have moved on and you should forget about those losses, it might result from you to lose more if you make a goal like that.
I agree those addicted gambler can't easily get away from gambling because they spend too much time on gambling. But still it can cured step by step no need to hurry just take your time to overcome your addiction and time will tell can cure you. For me I can stop gambling for a while if I know can cause me harm, I think having a goal can avoid you to addicton.