Because the arena is difficult for everyone?

My Deck is already one of the best
The arena shows only the strongest players with frequency
The logic is to improve the deck for the future reduce the completion time
It is getting worse with time
If you are not the first to enter the arena, you will spend hours to finish
I bet most uses macro to complete the arena.
the game has nothing clicking fight, jump, fight and jump
And we can not do sequence because is always the risk of losing.

My deck is currently 1kk +
there are few with close deck
just have the same players in the arena
always the strongest I