Currently the script editor hotkeys for zoom in and zoom out are ctrl= and ctrlshift_, meaning to zoom out you need to press an extra key compared to when you’re zooming in. It would be much more convenient to just press ctrl_ and ctrl=
Definitely an unintuitive shortcut – the standard is ctrl minus rather than ctrl underscore. The default should definitely be corrected, but in the meantime you can use File > Advanced > Customize Shortcuts to change the keybind for “Zoom Out”.