Hook Adding content after title

I need to add something after title in loop in single post and page, home page, categories. This is for a plugin and i don't want to modify the theme directly.

function after_title($title) {

       if (!is_admin() || is_single() || is_page() || is_home() || is_category() ) {

            $write = 'AFTER TITLE';
            $after_title = $title.$write;
            return $after_title ;

            }

      }
add_filter( 'the_title', 'after_title' );

But it add content everywhere, in the widget or sidebare loop and even in my menu. I just want to do it in the main content, not everywhere.

I also tryed other ways but i had the same problems.

add_action('the_post', 'atr_insert'); 
add_action('the_content', 'atr_insert');