Despite losing when the odds are overwhelmingly in your favor, the goal of winning poker is still to put yourself in this type of situation as many times as possible because when you do, you will win most of the time. Poker, however, is full of short-term variance (often called luck), which can be extremely frustrating. The reason for this is over the course of thousands of hands, the best hand will win the correct amount of time.
Poker must be viewed as one long lifetime game instead of many short sessions.