Other servicemen have written books as well as Chris Kyle, and Craig Harrison. Most people would know what being called an ACE would mean for a fighter pilot. This might be being sensationalized because it's Harry we are talking about.
In his autobiography, Kyle wrote: The Navy credits me with more kills as a sniper than any other American service member, past or present. Chris Kyle, With over 150 confirmed kills during four tours in Iraq, Navy SEAL Chris Kyle is considered the deadliest sniper in the American military
Craig Harrison In a BBC interview, Harrison reported it took about nine shots for him and his spotter to range the target, using a bracketing technique. Then, he reported, his first shot "on target" was a killing shot followed consecutively by a kill shot on a second machine gunner.
Harrison has written The Longest Kill, about his life and career as a sniper
Prince Harry has 'betrayed the Oath of Allegiance' after 'disingenuous' claims | Major Chris Hunter - GBNews
The Taliban accuse Prince Harry of 'war crimes' over killings in Afghanistan detailed in book
As for the Taliban complaining do they forget the way they sometimes fight (taking credit for) and what the word collateral damage means?
Why the Taliban Still Love Suicide Bombing
Soon after they seized control of Kabul in mid-August, the Taliban paraded their Istish-haadi (“seeking martyrdom”) or suicide bomber squadron on national television. The disturbing display exhibited an arsenal of suicide vests, suicide car bombs, and yellow plastic jerry cans—used to make the group’s signature improvised explosive devices (IEDs)—while a ballad glorifying the bombs and associated bombers played over the visuals.
https://foreignpolicy.com/2021/12/07/taliban-suicide-bombing-parade-violence-afghanistan/