Apples to oranges, it's like asking why are 4-man dungeons easy and 8-man savage so hard. It's because the content was designed with this in mind, to be this punishing for failure and to have to work up towards that goal again if you ended up losing. Savage content is designed to just be challenging boss encounter to overcome, POTD is a 4-man challenging content that is designed to be punishing in that one slip-up or chain of events and you could lose everything.
Asking to tone it down would pretty much be admitting to Yoshi that the players don't know what they want, because they keep asking for something challenging but not "challenging", they actually want "Challenging that they can beat" but then when they beat that challenge they go back and complain how it's to easy now. It's quite the cycle, there is no need to reduce the punishing factor of POTD because each run is a learning experience, as you do better you realize the ticks behind each mob and better means of overcoming the bosses. You end up with more items on hand to use in difficult moments and understand how you can manipulate rage, lust, witch, resolution in ways to reduce the amount of mobs you have to kill per floor. You learn how to manipulate the sight/safety in such a way that if you play it right on the last set of 10 floors you would only need to worry about 3 floors with traps.
You learn if someone steps on a trap that it only aggros them, if you don't panic and move back you can eliminate the risk of wiping when you are low on items and raise them and then take them out one by one.
POTD should not be looked at something where you see the punishing factor and beg for it to be "easier to handle" it shoudl be seen as self-reflection with each failure you learn something new and with your 99/99 gear things become easier.
At 99/99 even just 1 person with 3 others, POTD 51-100 can be cleared in about 2hrs. From 101-151 you could possibly clear them out on an average 35-40 mins for about 3hrs. And from the last 10, yea it could take the whole hr or 50 mins for a total of about 4hrs leaving you with 9hrs to progress from 51-200. So while yes it took you 14hrs to progress that far, it only took that long because you aren't use to those floors yet.
As you master POTD and understand how to use the items in a micro-managing way and you don't hesitate to use safety/sight as needed to speed up the floors along with witch to kill treasure rooms, combo with fortune to increase loot chances and affluence(treasure on next floor) item strategically, you can hit lucky chains in which you have more Rages than you know what to do with and can just run through floors because you are more familiar with the content and have learned how to manipulate the items to speed up the dungeon crawling.