Here's the thing, believe it or not, it's not the damage. When they reworked GA/Banshee's Veil/Abyssal Scepter/Athene's etc, THAT IS WHEN DAMAGE BECAME TOO HIGH. The reason? No one's building defensively anymore. GA is an AD item with some meager defense. Banshee's Veil has no HP and might as well be useless now. Abyssal Mask is so niche it's probably only used on like 2 champions and those are tanks looking to do more damage(because tanks need damage for some reason). Athene's is only built on healing and shielding supports. No one is building defensively anymore because all of our defensive options were turned into offensive options with slight defense and therefore everyone is doing too much damage.