I think that getting 5 of the same legendary would take years why cant it be as low as premium hero?

1.They take a really long time to get
2.They take more reasources to level up

Every week since the trophies came out and the right dungeon was there ive gone in to fight but so far i only have 2 of the same legendary it really will take me years to get my pillow.
Anyone else agree that it takes to long?