Trial of Chaos, 200 enemies per room body blocking me!!!

The one and only thing I dislike is Trial of Chaos (for now).
Utterly ridiculous. Infinite spawning enemies that body block you.
The suggested lvl for the trial is 38. I got a lvl 45, elemental sorcerer. I can easily first try bosses even in act 3. Obviously, some bosses take a couple of tries but nothing out of ordinary.

But I cannot get pass the third room of Chaos Trial.
I have no idea how people clear this Trial so easily. The only solution I see that I get overleveled like crazy and deal with this Trial later...

I just watched a guy on YT completing the Trial.
The guy got like 6 enemies per room, I got 200 per room!!!!!!

I'm watching the video and asking myself, Where are the 4-5 rhinos shooting lasers? Where are the hordes of enemies?

WHAT IS GOING ON???

I have had exatly the same experience yeasterday.