No, it’s because not being able to one shot isn’t the standard that people use to determine if something is broken.
From October 2020, just after the SL pre-patch.
First poster claims that before pre-patch, Mythic Archimonde took 17 seconds. Either he used a non-damaging ability to pull the boss, waited 16 seconds, then used his one shot ability, or it wasn’t one shottable at the end of BfA.
Can you finally accept that you’re misremembering?