Jimmy Carter could go down in history (for wrong or right) as a president that obeyed the law, told the truth and kept the peace. The details of his administration can be glossed over easily as most Americans under 30 couldn't tell you what state he was from or even point it out on a map. (pssst...answer is Georgia...look lower right)
But no, he has to open his trap every moment he gets to talk about how the current administration is wrong. To be fair, Carter may have a point because no one in this country is more knowledgeable on the subject of being wrong as Jimmy Carter.
I've shared this story several times before but I think it deserves another go. CSPAN was broadcasting old presidential debates during the 2000 election. One night they had Reagan and Carter's 1980 debate on. With 20 years of hindsight I was absolutely amazed at how often Jimmy Carter was on the wrong side of history. You can claim that Reagan was a bad president if you want, but the fact that the former Georgia governor was the worst president in the 20th Century is barely debatable.