Iv discovered a peculiar thing,if you run 3 mirror wall,3 WOD and few more strong traps in 1 deck it always bricks and that's without any lvl 5 or higher monsters in it. I believe the game is rigged in such way to make people always buy latest meta :/
that the problem with this game: konami can change the program in any form it wants. did u see the kc report? for konami, stardust dragon was more popular thn cosmo brain or blue eyes. Im sure konami consider how many players have a copy of this card and not consider the real play, only for force other players to spend their gems in a ur card.
konami can monetize with its game, but now it looks greedy. there are not good farm cards, useless event cards, boring miniboxes...all f2p and budget decks cant fight against the actual meta and the only meta decks are expensive or p2w.
Honestly, I'd suggest going for a Tier 2 or slightly lower deck. They stick around much longer, so the investment pays off for much longer. It's hard to keep chasing the best deck in format. Focus on something like Bujins or Geargia that's likely to stick around a while, and you'll be able to achieve KoG for a long time.