I usually have an edge on the field that i'm playing poker, but on other gambling games like blackjack I usually lose, which is expected, cause it was made for losing, although there are a lot of tactics and theory behind them.
By the way, I wouldn't consider poker a gambling game, cause it's a game that sometimes ou don't even need to see your cards, just play the other guys game and make a very nice and well spotted play on him and he may fold his hand, on the other side, poker is a game of cards and has luck envolved, but in the famous "long run" all poker players that make profitable plays, will be profitable in the long run, that is more than proved, so don't feel bad when you lose in the other games and only win at poker, cause that's normal hahaha