Fixed it myself. For future purposes, here is the fix:
<?php $options = array(
'post_id' => 'user_'.$current_user->ID,
'field_groups' => array(77),
'form' => true,
'return' => add_query_arg( 'updated', 'true', get_permalink() ),
'html_before_fields' => '',
'html_after_fields' => '',
'submit_value' => 'Update'
);
acf_form( $options );
?>
Declared the post_id as current user ID taken directly from wordpress
