u can deff become a consistant winner.. it isn't easy.. but it is very achievable! I was a b/e player for a long time and now its very easy to win for me..
in ur post u said u read books, watch videos, play etc... the one thing I did not see in there was hiring a good coach

Ive had several coaches over my early years.. and they are now my friends and we share thoughts of the games changing etc.

if u are serious about becoming a winning player... hire a coach... its deff worth the $.. look at it as an investment.. it will pay off!

dont get discouraged.. at some point.. no matter how much we win, or prove we are a winning player.. we still have days where we doubt are abilty