I play on my friends account for shits and giggles who is in Bronze 2. I have played like 25 games and only lost 3 games.
Its not hard. You just have to get good. I pick Annie, Ahri, Ori, Morg, Kayle.
I have never lost on Ahri Annie or Kayle.
The losses were from afks/people trolling (at the same time, not together, ive won with trolls and won with afks.