WordPress WP_Query compare not working?

What you’re trying to achieve is a LIKE query. But you’re using the compare arguments that are only present for meta_query arguments. You need to utilize a filter like the following:

add_filter( 'posts_where', 'wpse120358TitleLike', 10, 2 );
function wpse120358TitleLike( $where, &$wp_query )
{
    global $wpdb;
    if (
        'post' === $wp_query->get( 'post_type' )
        AND $wp_query->get( 'name' )
        // add further restriction arguments here:
        // AND ...
        )
    {
        $where .= $wpdb->prepare(
            ' AND %s LIKE %s',
            "{$wpdb->posts}.post_title",
            '%'.like_escape( $wp_query->get( 'name' ) ).'%'
        );
    }

    return $where;
}

Note that this is not a tested script. It’s meant as a guideline that can be built upon.