With Monaco struggling in the 2018/2019 season, Henry took over from Leonardo Jardim in October 2018 but it was smooth sailing for the Monaco star.
Henry only registered two wins from his 12 games in charge of the French club, before he was relieved of his duties in January after an embarrassing loss to Strasbourg.
"We played in the Champions League with five strikers who were 18 years old. Even if they are good players, they do not have the experience to play games like that.
"It was a hard season for them. I have never been in a situation like that in my life. I think people don't really know what happened with Thierry.
"In my opinion, the club did not give him enough time. The training sessions were really good and the ideas were bright, engaging and good.
"When he had the players back fit, and the team starting to be how he wanted, the club sacked him. I did not agree with that. If they had given him more time, he could have been a fantastic coach for Monaco.
"In training, I could see the signs. The team had confidence back again. Things were going well at the moment they sacked him."
Henry is now managing in Major League Soccer with Montreal Impact, although their season has also been halted due to the coronavirus.