There are purchases encouraging you to improve your cards, but the game is so hard that each tour is difficult to crack. The algorithm is made to keep getting harder as u improve your stats. At least the dev should give some relaxation in defeats. Trophies lost on defeat should be less, unlike now which is almost equal to trophies recieved on wins. Thats wrong. At least keep novice and expert, 2 categories so that everyone can play. this is expert by default, which is insane.. disappointed..