I'm using Ubuntu 17.10, GNOME. In a VMWare 14 Workstation VM. TextMaker and other FreeOffice apps are basically unusable because of this interface issue.
Aside from ONE test, and I'm not sure at all what might have been different in that test, it looks just as bad in KDE as it does in Gnome. I'm not sure if FreeOffice is based on GTK or QT but other QT apps look fine in Gnome and other GTK apps look fine in KDE. It's just this one thing, it seems.
I have also completed the steps in the accepted answer here and the one below to entirely reset the gnome config to no avail.