Where can I change the design of all the My account pages such as ”dashboard”, ”my orders”, ”my account details” etc. I want to change the design, but also the input; for example the Country option at delivery address is not necessary so I’d like to leave it out of the form.
Sorry to say but right now there is no option in Theme Settings available for that. It requires Customization and this is beyond our limitations and support policy scope. Hope you can understand our limitations.
I suggest you find some plugins from WooCommerce to customize the My account page.