The actual game difficulty is Perfect.

[KitiaraIornsight]

here's a video of someone RP walking through the impossible to dodge boss you just mentioned.

Good for them. they have no latency issues. Again, I'm pointing out this boss becomes a problem for players experiencing latency. I've had runs where i've gone into that fight had ZERO latency and not get hit with a single vuln stack. Then i have runs with terrible latency and its a wipe fest. I'm saying the issue MANY are facing with this particular fight is directly related to LATENCY.