The deck is too big, which renders it inconsistent. For grinding lvl 3s and 4s, you want consistency in victory and also speed (so you can play more, get more wins, win more cards and coins, etc.). There are decks which can achieve both of the above, but the game is more about playing with decks you actually like and have fun with.
The hourglasses do speed things up a bit, but it'd do well as a 30-40 card deck instead. I would trim it down for you right now, but I'm just getting ready to go to bed right now. Maybe tomorrow. Hope to see more
newbies like you around, like myself.