Increase the default size
The default terminal size seems to be orientated on a pretty old standard which does not make that much sense anymore nowadays.
Probably relevant line and file: https://gitlab.gnome.org/GNOME/gnome-terminal/-/blob/master/src/org.gnome.Terminal.gschema.xml#L227
This has been proposed and implemented by me for the KDE terminal (Konsole) in the past as well, so linking for reference: https://invent.kde.org/utilities/konsole/-/merge_requests/125