I concur. The visual “node map” was what initially attracted me to Twine, but it was ultimately what put me off Twine as well. My PC is optimised for animation and visual effects, but scrolling around the node maps for my two large Twine games is noticeably laggy.
Recently it occurred to me that I could create a “scale model” of my Ink games in Ink itself, with each scene summarised in a single knot. It works quite well for me, but it depends on how you structure your games. Mine are quite labyrinthine.