QGIS is janky? It's quite possibly the smoothest and best running GIS software available today. Most built-in tools run way faster than AG Pro, and once the move to QT6 with 4.0 is complete this october, we'll finally get native builds on M-series Mac as well.
I couldn't even know where to start listing the upsides compared to ESRI offering, fron PostGIS integration all the way to the simplicity of plugins.