Blurred Thumbnails

Hey there!

The Regenerate Thumbnails plugin uses the WordPress functions for image resize.

I dug into that trying to figure out a way to override the quality options if someone needs some “special” quality, but unfortunately I didn’t find any filter for that.

The WordPress part that runs it is here:

https://core.trac.wordpress.org/browser/tags/5.5/src/wp-includes/class-wp-image-editor-imagick.php#L359

In this case, I’d recommend you to try the https://jetpack.com/support/site-accelerator/ to see if it works better for you.