Wordpress remove_action within class - wordpress

Question

I am trying to remove an action added by the Woocommerce Memberships plugin. Tracing back the actions contains functions it is initially added to the hook under
class WC_Memberships_Frontend {
public function __construct() {
add_action( 'woocommerce_thankyou', array( $this, 'maybe_render_thank_you_content' ), 9 );
But this class is called by a private function and is a protected by the variable that its parent class declaration (as far as I can tell)
class WC_Memberships extends Framework\SV_WC_Plugin {
protected $frontend;
private function frontend_includes() {
// init shortcodes
require_once( $this->get_plugin_path() . '/includes/class-wc-memberships-shortcodes.php' );
\WC_Memberships_Shortcodes::initialize();
// load front end
$this->frontend = $this->load_class( '/includes/frontend/class-wc-memberships-frontend.php', 'WC_Memberships_Frontend' );
}
I have search and tried a number of ways to remove this
remove_action( 'woocommerce_thankyou', array( 'WC_Memberships', 'maybe_render_thank_you_content' ), 9 );
remove_action( 'woocommerce_thankyou', array( 'WC_Memberships_Frontend', 'maybe_render_thank_you_content' ), 9 );
global $WC_Memberships;
remove_action( 'woocommerce_thankyou', array( $WC_Memberships, 'maybe_render_thank_you_content' ), 9 );
global $WC_Memberships_Frontend;
remove_action( 'woocommerce_thankyou', array( $WC_Memberships_Frontend, 'maybe_render_thank_you_content' ), 9 );
None of the above work, and other ways of trying to call WC_Memberships()->frontend; throw errors like 'Cannot access protected property WC_Memberships::$frontend'
Im not sure if the private function or protected variable are getting in the way, or if Im just not understanding something about removing an action within a class or nested classes but help would be greatly appreciated.
Edit:
Based on the code found here Ive tried
remove_action( 'woocommerce_thankyou', array( wc_memberships()->get_frontend_instance(), 'maybe_render_thank_you_content', 9 ) );
but still no success.

Answer 1

My issue was trying to figure out how to match the $this in the original add_action add_action( 'woocommerce_thankyou', array( $this, 'maybe_render_thank_you_content' ), 9 ); to remove it.
I finally stumbled on this chunk of code which showed me how to reference the proper instance of the class.
Final working code:
remove_action( 'woocommerce_thankyou', array( wc_memberships()->get_frontend_instance(), 'maybe_render_thank_you_content', 9 ) );

Answer 2

As you probably know, it's usually not good practice to modify core or plugin files. Using a modification to the answer here , you could try adding to your themes functions.php file
function remove_aggravating_wcactions()
{
remove_action( 'woocommerce_thankyou', 'maybe_render_thank_you_content', 19 );
remove_action( 'woocommerce_thankyou', 'maybe_some_other_content', 20);
...
}
add_action('template_redirect','remove_aggravating_wcactions');