In 2021, around version 3.point.something, Redshift changed its default color space from what it called “scene-linear Rec.709-sRGB” to ACEScg. If you’re using DaVinci Resolve to muss with your newly ACES-compliant Redshift EXRs, then you need to change your color settings.
TL;DR If you’re seeing color banding in your exported video, it’s almost certainly because you’re using an encoding profile that specifies a color depth of 8 bits. Use a codec, such as H.265 / HVEC, DNxHR or ProRes, that supports 10 bit color and configure it to use a 10 bit encoding profile.
Out of the box, Davinci Resolve’s UI font and icons are so small that they are practically unreadble on small, hi res (aka high DPI) monitors. Even 1440×2560 on a 27″ screen (e.g. EIZO ColorEdge CG2730) is horrible.