Are all R2R dacs slow and soft?

My Rockna Wavedream Signature does the things you're after. I've owned DACS from MHDT LABS, Aqua, and TEAC. The Rockna would literally startle me sometimes when I first got it due to its drive, dynamics, and detail. It is never bright, unless something else in the system is. As always, system synergy and budget come into play. 

Some.  I just got a dac and when researching, some were eliminated because they were soft, and the measurements seemed to show it.  Not all R2R dacs are that way.  Do searching for brightness - sometimes reducing toe in helps reduce treble energy.  The DAC you have was on my list and based on my reading, I did not consider it bright.  I did not get it, though. 

What’s your budget, and are you looking for new or used?

Under 5.

Either new or used

I have a Laiv Harmony DAC and it is crisp, precise and presents an accurate reproduction of music I know very well. I would not use the terminology of either soft or slow to describe it, but I am uncertain what you mean by that also, perhaps. But those words do not come to mind for me when I use that R2R DAC. It was well under 5K and will jump up about a hundred in two days.