J.C.Ryle said " There's no disappointment in God. Everything that God allows to come our way is always with a purpose. He used even the greatest error and deepest pain to mold us into a better person. Even if no one else acknowledges your hard work and effort, remember, God sees it. He is the one who promotes; He is the one who exalts. Honor Him in all you do, and He will direct your path". 

Romans 8:28 says And we know that for those who love God all things work together for good, for those who are called according to his purpose. Sometimes God recuses us from our greatest error and deepest pain, Sometimes God rescues us out of bad situation. Because God sees it all, He knows what's best.