What do you think about the Level system?

I struggle Wirth Leveling My Deck (RG cycle With Monk instead of Ghost) for a Higher League, but i Just dont Know how to Level My Monk as a f2p, My fisherman and Log are hard to Level too. I dont Know how to make My Deck level 15 If i want to Push to ultimate Champion (and I want) do you Know how i could Progress faster cause i dont Wanna get p2w

You could save up boost potions to push. I save up to like 6 boost potions and just boost lower level cards so that I can push. It’s pretty much the only option since champions are p2w now.