WordPress query posts without ACF repeater subfields AND specific value - mysql

Question

I have two custom post types, playlists and games. Playlists have a ACF repeater field, that contain games.
My goal: I am trying to build a simple query, that gets all playlists that DO NOT have this game listed in the repeater field AND alll playlists that are empty (do not have any repeater fields / database entries at all). I want to use the get_posts() function to achieve my goal, if possible.
My problem: I can only get the query to show ONLY the playlists that HAVE the game by using the = operator in the "game_filter" meta query compare field (but I want the opposite). If I choose the != or <> or IS NOT operator, it spits out all available posts. And if I also include my "empty_playlists" meta query, it ALWAYS shows me all playlists, no matter what operators I use, even tho it is a OR and the listed posts do have entrys.
I tried a lot but just cant get it to work. All exmaples I found were about different things, mostly about the % problem with the repeater field names and its solution. I hope someone can help me with this real quick. What am I doing wrong? Please help fellow and better coders! :-)
This is my code
$excluded_playlists_game_id = 274;
$user_id = 1;
$args = array(
'post_type' => PSiCorePostTypes::PLAYLISTS,
'author' => $user_id,
'order_by' => 'title',
'order' => 'ASC',
'suppress_filters' => false,
'meta_query' => array(
'relation' => 'OR',
'game_filter' => array(
'type' => 'NUMERIC',
'key' => 'psi_playlist_games_%_item',
'compare' => '!=',
'value' => $excluded_playlists_game_id,
),
'empty_playlists' => array(
'key' => 'psi_playlist_games_%_item',
'compare' => 'NOT EXISTS',
),
),
);
$user_playlists = get_posts( $args );
and this function for the % problem.
add_filter( 'posts_where', 'get_user_playlists_query_allow_wildcard' );
function get_user_playlists_query_allow_wildcard( $where ) {
global $wpdb;
$where = str_replace(
"meta_key = 'psi_playlist_games_%_item",
"meta_key LIKE 'psi_playlist_games_%_item",
$wpdb->remove_placeholder_escape( $where )
);
return $where;
}