60 letters in four years would be more than one a month. Maybe the reviewers are tired of reading your stuff. If your letters to the editor are as personally abusive as many of your forum posts, it's not surprising they are tossed into the waste basket. But you're still getting 5 to 7 published a year. In fact the R-G publishes a lot of pro-Trump, pro-conservative, and anti-liberal letters. A lot of letters have no obvious political theme. Your 8-1 ratio doesn't sound right.