why am i so bad?

[ochoduece]

ive been plpaying about a year..mostly nl hold em and some nl hold em tournaments. i am a consistant loser despite understanding the game (i think). i began by playing way too many hands, then got much tighter and found little consistant success. i was very passive, but am now pick my spots and am aggressive when i have the best of it. but even when i am patient and appropriatly aggressive, i find i am still in the red. it just occurred to me that in about half the pots i win, i don't have the best hand...i am not called. does this indicate anything? i need all the help i can get!