Anger Management achievement/trophy needs to be modified.
I like a good challenge. I've gotten all 1,000 Gamerscore in many Ubisoft games, including every Assassin's Creed game, both Watch Dogs games, the Grow Up/Home titles, every Far Cry game since 3 (Got 860/1k in FC2), Valiant Hearts, Beyond Good & Evil HD, Driver; San Francisco, Outland, the Prince of Persia titles, and SC: Blacklist. I rarely complain about the difficulty of an achievement unless it is betrayed by the game mechanics, like the pre-patch drinking game achievement in Watch Dogs 1.
Right now only 0.63% of gamers on Xbox have unlocked the Anger Management achievement, and the only other achievements which are close in rarity is Master Skinner with 1.35% (and I assume that's because people miss the cattle in the challenge) and Hit The Road for completing every expedition on level III difficulty at 1.41%. I believe the reason this achievement is so rare is due to a frustrating problem with the game's controls.
The Anger Management achievement/trophy ask you to "Eliminate 10 enemies within a single activation of Wrath." After activating Wrath, you then need to perform the "Eden's Wrath" move to kill enemies and extend your time using Eden's Gift. The problem here is that activating "Eden's Wrath" is very temperamental and often the button prompt does not appear or the move does not go off. This results in multiple frustrating runs where you could have accomplished 10 kills but instead your character just knocks someone's helmet off instead of executing them.
I suggest that you halve the number of people needed to be killed to 5 in order to keep in line with the game's mechanics. This will still result in a fun moment for the gamer but will avoid the frustration many are having.