I tried to recoup 0.05BTC that I lost. I ended up losing 0.07 more on bitcoin. That was pretty much all the bitcoins I had so I've never gambled since.
Many people are experience the same as your because it is hard to win in gambling if you are not wise to choose if what game that actually giving you a good profit.. and people are not satisfied and they are greedy.. if they lose they still want to recover it even it is hard to recover them..