Please tell me that it is bugged.
Enemies spawn endlessly and they deal too much damage. This is like gear check! No strategy nor skill play.
I almost lost my char there.
There is indeed currently a bug where approximately five times as many enemies spawns as was planned.
This was introduced by a change very late in the patch cycle and unfortunately our QA team didn't catch it.
We'll fix this up in a future update. Apologies for the inconvenience!