It is reported by Politico, citing sources.
In particular, he called Trump’s decision “a terrible signal” to invite the leaders of the radical Taliban movement * to the suburban residence of the US president at Camp David, which, according to Bolton, is a disrespect for the victims of the September 11 terrorist attack, as the Taliban harbored Al Qaeda "** at home.
Along with this, he criticized the idea of negotiations with the DPRK and Iran, as they are "doomed to failure." According to him, the North Korean and Iranian parties are interested in negotiations only for the sake of facilitating the US sanctions regime.
On September 10, Trump fired Bolton. He explained his decision by the fact that he did not agree with many of his proposals.
As the US president noted, Bolton made very big mistakes.
* "Taliban" - the organization was recognized as terrorist by the decision of the Supreme Court of the Russian Federation of February 14, 2003.
** Al-Qaeda - the organization was recognized as terrorist by decision of the Supreme Court of the Russian Federation of February 14, 2003.