What is the toughest part about learning the English language?

When you think that you're that good in English , then you stop at that thought , & , hold onto it , like you've accomplished your ultimate goal of excelling in it !!! ( Bad Attitude ) , then , one day , you wake up from your Day-dreaming , only to find out that you were stuck in a rut ( Stuck in Neutral ) , & , your English did not amount to that much ( Pidgin or Broken English at the best of times ) , & , you try to pick up the pace by trying to pick up from where you left off eons & ages ago , only to be hit with the cold-hearted truth that you've wasted such a long & valuable time thinking that you've mastered it ( HELLO ! ) , so , you try to re-launch your So-called Journey ( Alleged True Calling ! ) in learning English , only to find out that it is very hard & difficult like you're stuck in Revers ( One step forward Two steps back ) ) , then , out of the blue , right then & there , it hits you , & , struck you , like a ton of bricks , that it's not only about being or thinking that you're good or excellent in English ( STATE OF MIND ) , but it is also about being committed to it right from the word-go ( Commitment & Taking the Initiative ) , keeping always in mind that if you do want to do some thing right , you not only do it your self , but you do it just Right .
To my mind , that's the difficult , in-your-face & frigid cold-hearted toughest part about learning English .
( & That's the way it goes ) .
--