My strategy has been to follow accounts that just repost reviews by well respected film critics, usually older ones like Stanley Kauffman or Pauline Kael. Typically they're well written even if I disagree with the take, and they avoid the overwriting problem that even the more thoughtful Letterboxd users are prone to (easier to write a long, rambling review than a concise one). But those accounts get taken down occasionally, usually don't have any reviews for more recent movies, and have spotty coverage even for older movies.