There are a couple of different ways to work with the ACF image object, depending on the return type: https://www.advancedcustomfields.com/resources/image/. It looks like you’re working with an array, but you’ve got some extra image attribute markup. Try something like this:
<img src="https://wordpress.stackexchange.com/questions/354614/<?php echo esc_url($im["url']); ?>" alt="<?php echo esc_attr($im['alt']); ?>" class="top-ten">