Riot has spent all season gradually reducing damage
When do we stop complaining about damage being "too high"?
I mean, at the end of the day, if you play a bunch of carries and assassins, you're gonna fucking die if you get hit by an ult and a stray skill shot. If you really DON'T wanna die in 1.4 seconds, play something like a tank or a tanky juggernaut.
There's tons of variables that go into who does how much damage and how fast they do it, but it's really easy to reliably manipulate how much damage you take at once...but people generally want to play carries in solo queue so why are you complaining about dying fast? Carries die fast. Always.

is a tank in any way
with nothing but tank items. That doesn't make her a tank just someone who can take damage
gradually
reducing