The Aubrey event was actually done well. It was challenging, but it was beatable with enough tries. Chloe's level 6 is physically impossible without spending gems or getting a once in a lifetime RNG. I've lost at least two dozen times, even while using extra moves sometimes. It was 100% created to make people spend money. Truly the most poorly designed level among the game's 300+ options. Combine that with the frustration of having to keep restarting 4 + 5 (which aren't easy either, especially 5), and it's pointless. Do better next time.