It is F2P, you just need to be patient and farm a lot of gems: unless you love the Infernity archetype, you really shouldn't (a Cyber Dragon deck is much more powerful and less "expensive").
That's it bro . We are in 2020 not in 2016 where this game was launced ... You have to face it and accept it. some old decks and even very old decks can be viable and some old expert players can even reach Legend and rarely KOG with them. Nowadays each deck has its counters and you should make the deck that you love even if it will have hard time in Ranked playing
I guess so, but I really wanted a deck to get to KoG any time of the season, this deck feels like can only do so at the final days.
Fortunately I pulled all the Weather Painter cards and they do perform well against many decks. I wish I had stopped once I got the weather stuff instead of digging for Infernity.
I've been having good results running the old deperado deck with machine fortress splashed in. Only deck it struggles against is Aromage with their backrow, and and yosenge with their bouncing effect.