Appreciate that dwarf fortress is an 18 year old game. They first released it in 2006 and even then the interface was clunky and never a priority. It is a dwarf simulation engine first and an interactive game second.
RimWorld owes its existence to Dwarf Fortress the way Halo owes its existence to Doom, or World of Warcraft owes its existence to RuneScape. Dwarf Fortress is the precursor for all games like RimWorld. So comparing their interfaces will always set Dwarf Fortress up to lose, just like if you compared the controls in Halo against the original Doom. I think you have to approach Dwarf Fortress more like playing a piece of gaming history, and a look into the world of a very interesting human, Tarn Adams, rather than a modern game competing against modern titles.