There are many things to change.

Main problem : you need more consistency. There are no cards (Kris apart) you play with 4 in your deck. You can't plan your turns because you don't know what you will draw.

You must ask to yourself for each card "How many do i want to see in the first 20 cards ?".

As a general guideline :
- max 3-4 : play 4. For exemple Jasmine, Kris.
- max 2 : play 3. For exemple Smashing blow, Unique creatures like Aldon or Aeon.
- max 1 : play 2. For exemple Enrage.
- never play single cards.

To improve the consistency you must also reduce the number of cards to 40.

Second problem : strategy. Read this article which will help you refine your strategy.