Contrary to popular belief, Clash Royale is not completely pay to win (P2W). I myself am a Free to Play (F2P) player and, with the help of RoyaleApi, I used decks like Miner Poison or wallbreakers and win easily. My cards are all level 10 or 11 in that deck. I also use RH cycle.
What’s finally good is that CR is giving us some help with free evos. Without the free evo from February, the game would just be P2W. I’m continuing to push on Ladder pretty good with low level cards; you just need to be good at the game.