Frustration is the by-product of attempting to fulfill responsibilities God does not intend for us to carry. Freedom, joy, and fruitfulness come from seeking to determine God’s priorities for each season of life, and then setting out to fulfill those priorities, in the power of His Spirit, realizing that He has provided the necessary time and abilities to do everything that He has called us to do.
Don't assume you have to be extraordinary to be used by God. You don't have to have exceptional gifts, talents, abilities, or connections. God specializes in using ordinary people whose limitations and weaknesses make them ideal showcases for His greatness and glory.
An evidence that our will has been broken is that we begin to thank God for that which once seemed so bitter, knowing that his will is good and that, in His time and in His way, He is able to make the most bitter waters sweet.
Brokenness is the shattering of my self-will - the absolute surrender of my will to the will of God. It is saying Yes, Lord! - no resistance, no chafing, no stubbornness - simply submitting myself to His direction and will in my life.