It is a money stealing game.
First you have to buy or it will be hell (with which deck?) to win to make dust-gold to buy packs & craft a good deck.
Second, past experience does not matter (foolishly) if you played all these years or bought expensive stuff you have to do it again and again for new set everytime.
Third, playable decks are limited. There's always something annoying to exist to keep you away from perfection (op annoying decks that need nerf, etc) & the most cards of the game are useless and never playable before.
And there is not a good place where things are balanced and you can have fun together (not even netdeck free). Game needs too much luck.
Do the best, and quit.