Hopes were high that the latest Diablo 4 patch would address the problems around Mythics introduced in Season 14. Alas, this isn't the case, as the update, coming tomorrow, July 14, only addresses a sliver of the issues, leaving players hoping for more systemic change in the weeks to come.
Essentially, the new season, Death Awakening, made Mythic Uniques a general pain in the backside. Crafting them is trickier; the drop rate for the items as loot is staggeringly low, and even using them isn't as effective as it once was.