Slows down blog with a lots of articles (and had security issues)

I am having an aggregator website with thousands of articles in the database and this plugin slowed down the whole website with his crappy querys, until I found out the source of problems.

SELECT SQL_CALC_FOUND_ROWS wp_3_posts.ID FROM wp_3_posts WHERE 1=1 AND (((wp_3_posts.post_title LIKE '%[wpgdprc\\_access\\_request\\_form]%') OR (wp_3_posts.post_excerpt LIKE '%[wpgdprc\\_access\\_request\\_form]%') OR (wp_3_posts.post_content LIKE '%[wpgdprc\\_access\\_request\\_form]%'))) AND (wp_3_posts.post_password = '') AND wp_3_posts.post_type IN ('post', 'page', 'attachment') AND ((wp_3_posts.post_status = 'publish')) ORDER BY wp_3_posts.post_title LIKE '%[wpgdprc\\_access\\_request\\_form]%' DESC, wp_3_posts.post_date DESC LIMIT 0, 30

Secondly I nearly got hacked because of this plugin. So I just want to give it up now.