I would disagree. Until Biden, he was the worse President in modern history. But he IS the worse Ex-President - even worse than Obama IF he was pulling all the strings in the Biden presidency.
Erick Erickson and Scott Jennings both have the best brief video takes on this I have ever heard (links below). But stories I have read over the years of Carter's public persona of being this soft spoken Southerner, was just that - a public persona.
His meddling in foreign affairs and US policy was very well known. I didn't remember that he actively tried to get the Russians to interfere in Reagan's second election but he did. Clinton and Obama both were frustrated with his interference as were the both Bush Presidents and Trump. He was in too poor of health to interfere with Biden's presidency. He took the side of every dictator around the world as an ex-President undermining whatever was the policy of the sitting President. He actively worked against the interests of the United States as an ex-President.
In Scott Jennings link below - he mentions how Jimmy Carter wrote all of our allies leading up to the Gulf War trying to get them to abandon the coalition with the US. Philip Klein's post correctly states that one could call his post presidency meddling as treasonous.
The only good thing about his post presidency was his work with Habitat for Humanity building houses. He was an absolutely horrible ex-President!
https://x.com/EWErickson/status/1876431062718644735
https://x.com/ScottJenningsKY/status/18 ... 2384307315
Philip Klein's article is behind a paywall, but his X post summary of it:
https://x.com/philipaklein/status/1873507058177450362