Why is Decrepit Sewer so hard

Like I'm talking about the corrupted version in particular
I could do the corrupted version of Infested Pit, Timelost Sanctum and Sand-Swept Tomb combined, it would be easier than doing 1 Corrupted Decrepit Sewer
And like it's really annoying since I tend to do the Forgery in the order of the highest level to the lowest, so dying on Decrepit Sewer when I did all the other one before really make me want to quit

 

The only hard thing in that dungeon is dodging witherheads arrow storm if you have no ehp and no good mobility

 

the real question is why are you torturing urself with forgery, I don't think it's worth it anymore money-wise lol

 

What part in particular are you finding difficult? With a good high-level build, it shouldn't be all that challenging, outside of the aforementioned dodging of Witherhead's arrowstorms.