Images with super low quality

Hi.
As you can see in the post linked, the images are in super low quality, and whenever I click to zoom, the quality gets better. I can notice that on almost every image on the website.
I’ve tried changing the crop options from fill to fit and also removing the custom functions I have, and nothing seems to improve. The only way so far, was removing the plugin as a whole, but I wouldn’t want to have to do that.

Could you enlighten me here maybe?

Below are the custom function, although I’ve deleted it and didn’t work:

// Add Webp
add_filter( 'cloudinary_default_args', function ( $args ) {
	$args['transform']['fetch_format'] = 'auto';
  $args['transform']['progressive'] = 'semi';
  $args['transform']['quality'] = '90';  
	return $args;
} );

The page I need help with: [log in to see the link]