Lol. Toons and naturia both are f2p and they CAN reach KoG. Even gravekeepers can be considered f2p if you have patience to get 2 soul exchange and 2 double summons
For A f2p player reach kog takes so much time, Took me 3 months to reach it but today should take more because when i started only 3 box were launched. Just play and dont complain, you will become a king someday
Patience, be very patient and play a lot of ranked matches till you reach legend, then when in legend, you know you are half way from kog, or almost half, the hardest battles are to come, but isn't easy to anyone, so drop your life to play ranked