Is Ruby Storm Bad

Hi All

I am an EDH player who has been looking to get into modern, but I can't seem to win a single game on the casual lobby. I am playing Ruby Storm as it was the cheapest MTGO deck on MTG Goldfish, and I have experience with long lines of play from CEDH. I have played about 15 games and have not had a single win. I play Hearthstone and get Legend every season, so I am surprised that I am finding the transition so difficult.

Am I just bad at the game? Playing a bad deck?