Unfortunately, our theme styles are not applied on the editor page. But when you visit your website on frontend it will work correctly. If you want to fix the editor you will need to find its CSS files and add the following code there

.rtl.vc_editor div#wpcontent, div#wpfooter {
	margin-right: 0;
}

.rtl.vc_editor div#wpcontent {
	padding-right: 0;
}

For HTML Block you can activate easily in Dashboard -> WPBakery page builder.