Thats true, you cant win back what you lose and thats the fact. Chasing your losses can make you penniless, i know someone turn his life upside down because of gambling. Better to stop and focus in some other things, if you can refrain yourself from using computer or gadgets do it. When a person became addicted it would be hard to go away with the addiction so keep that in mind.
Yes, many haven't been able to return from such dangerous stunts of trying to recoup what has been lost in the past. There shouldn't be any haste in trying to win back what you've lost if you ever loose in gambling because chances are that you will not be making your decisions with a cool head and might make a mistake that can make you loose more.