Any ways to remove all default stylesheet?

Hi,

What do you mean by "disable loaded CSS files"? Are the CSS files to show the form? You can override the style by using your CSS code.

Hi,

Each field or extension will load its script files (CSS or JS) when showing on the page. You can find here https://github.com/wpmetabox/meta-box/tree/master/css

So it is not encouraged to disable the code-based CSS of our plugin to keep them work properly. If you want to do, this article might help you accomplish that https://digwp.com/2019/03/disable-script-style-added-plugins/

You can use this and call it with some hooks provided by the extension

		// Unload default styles loaded by the plugin
		wp_deregister_style( 'rwmb-group' );
		wp_deregister_style( 'rwmb-tabs' );
		wp_deregister_style( 'rwmb-columns' );
		wp_deregister_style( 'mb-tooltip' );

		// Unlaod default scripts loaded by the plugin
		wp_deregister_script( 'rwmb-group' );
		wp_deregister_script( 'mb-show-hide' );
		wp_deregister_script( 'rwmb-tabs' );
		wp_deregister_script( 'mb-tooltip' );