How Do You Become a Consistently Winning Player?

I'd like to start out by saying I know almost nothing about this game beyond the basic rules. That said... What makes a player win consistently more than other players? I get that with enough studying and understanding one can master the understanding / odds of whats on the table vs whats in your hand vs what can potentially be made on the table with other hands... but at the end of the day it seems that theres a huge degree of randomness involved simply by the human factor of people not playing exactly by the mathematical odds. This obviously makes this game very interesting, but I still don't fully comprehend how someone can consistently win based on that human factor + the randomness of the cards. Is there a fundamental misunderstanding that Im having here?