For those finding the UI too complex, there is the option of a simpler UI - https://app.diagrams.net/?splash=0&ui=sketch https://app.diagrams.net/?splash=0&ui=s

For those finding the UI too complex, there is the option of a simpler UI - https://app.diagrams.net/?splash=0&ui=sketch https://app.diagrams.net/?splash=0&ui=sketch . That can be set under extras->theme->sketch.