The most frustrating aspect of online poker is the unpredictability and perceived unfairness of the game. Many players feel that the algorithms governing card distribution create unnatural outcomes, leading to frequent bad beats and improbable hands. Additionally, the presence of bots, collusion, and multi-accounting can undermine trust in the fairness of the game. Technical issues, such as software crashes or disconnections, further add to the frustration, especially during critical moments in high-stakes play.