No, its a fair comment.
It wasn't a lie was it, it was fair and accurate comment. He did quit, and he did say the job was far harder than he thought, direct quotes:
"I was very critical of England’s public education system under the last Labour government, and I hadn’t grasped how difficult it is to do better, and to bring about system-wide improvement.”
"As someone coming into education from the outside, the bits you see of other schools are only the tip of the iceberg.You think, ‘well, I could do better than that’, as you are pointing to the tip of the iceberg, without realising how much more there is to it.”
So Yes I was accurate, and I was right.
"I didn't like being asked to perform in my tax payer funded job so I decided to have a holiday because of 'stress'. See it all the time in the public sector, but not so much much in the private! "
See the quotes from Toby Young above, you know nothing of the pressures in the public sector, oh and in my experience, the private sector can be far more massively wasteful than the public, and far more cushy too.
You are being nasty, you know it.
Oh and referencing Hitler in a debate about the popularity of policy vs their ethical position is perfectly relevant.
Do try harder dear.