An option here would be to have a new item in the top left menu (by default, your theme may move or even remove this) on the window: Untheme App looks like cra

An option here would be to have a new item in the top left menu (by default, your theme may move or even remove this) on the window: Untheme App looks like crap? Untheme it and file a bug if it still looks like crap. Icons don't make sense? Untheme. Looks more sensible now? A one off patch to GTK (other toolkits are available) and this problem has a solution.