I empathize with you. I've noticed that as soon as I commit yourself to become an even better Christian, the devil makes his move, as if to test my sincerity.
My first couple of years as an Orthodox Christian have been tough. First, I am being tested and discouraged by the devil, and, second, I am being pruned and shaped by God to be a better Christian. I was in deep despair about the first until I realized the second--God was answering my prayers!
For example, I pray the 50th psalm several times a day: "Create in me a clean heart, O God and put a new and right spirit within me...The sacrifice acceptable to God is a broken spirit..." You don't get a new and right spirit or become broken enough to be an acceptable sacrifice unless you are challenged. You can't just declare your intention to be a better Christian; you have to let yourself be melted down and purified by adversity--rid yourself of your ego--before God can create a pure heart in you. If you are capable of growth, God prunes you so that you will bloom all the stronger--just like a rose bush.
I've come to believe that adversity is the answer to our prayers to be better Christians. Just about the time we're ready to cry uncle, we can take no more, God lifts his hand from us, and we realize that He has been working in our lives all along. He lifts it the moment we learn the lesson, and it illuminates us.
Christianity isn't for wimps.