Why I have to go Drowned city everytime after killing Trialmaster?

As stated in the title, why do I have to go to the Drowned City just to get back to my hideout via a waypoint?
If you don't kill the Trialmaster, you can simply teleport back to the Trial of Chaos door using a portal — but that portal doesn't appear if you choose to kill the Trialmaster. Normally, I open a portal and teleport to the Ziggurat Encampment, but guess what? The Ziggurat Encampment has no waypoint, since you've progressed through the story and the waypoint .
Of course, when you try to enter that gate, you're forced into Act 1 Cruel, and even from there you can't teleport to the Clearfell Encampment you just teleport to problematic act3 Ziggurat Encampment even if you clearly unlocked Clearfell Encampment from Act1 Cruel. Other option is The Jungle Ruins but waypoint is located in the middle of the map. In the end the closest accessible waypoint ends up being in the Drowned City.
It's just too much hassle for farming a single boss.
Why not just keep the original waypoint active?
Please fix this — we don’t want to be FORCED through this much inconvenience just because we defeated the boss.