This energy system sucks !

I play dragonite, so I have both water and lightning energies, but the algorithm is SO BAD my deck is often unplayable ! They only give me one type of energy until, like, round 17. This is so frustrating. And they say it's random, but I don't buy it : at first I had only water pokemons in my deck with my dragonite, and I would only ever get water energies. I added a Zapdos, and all of the sudden I started to get lightning energies... I miss the energies that actually were cards ! (or at least an option that allows us to pick how many of which we'd like ?)