This game used to be great. Through all the Overpowered garbage and bad luck I stayed, for almost 50,000 combined games on multiple accounts. You can't really progress through the highest leauges without shelling out, the amount of premium currency and Seals you get is trash. And even in unranked you keep getting paired up against people who have essentially level 4 cards (seals). New players used to be protected to an extent at the start, now they can be paired up against very senior players with no level differential. 5 level 3s vs 5 level 1s.
Also the amount of bug that this game has in incredible, so many of them can force you to refresh while getting stuck on the most stupid stuff.
TLDR: If you are a new player, and see this. Don't play this game, it's not worth your time or money.