Rafa Benitez says he is refusing to get in a war of words with Mike Ashley and Newcastle United officials.
The former Toon boss is now focusing on the future and is due to be announced as the new boss of Dalian Yifang in China.
After failing to agree terms with United, Benitez said: "If I start talking about every problem we had, then it will be wasting energy.
"It is not a time to criticise, but a time to analyse.
"People talk about power, money and control, but it wasn’t about that.
"It was about doing things right.
"At Newcastle, we didn’t have the money the top sides had, so the first or second choice targets were really important because the third or fourth ones would be worse and worse and then you lose something.
"You work so hard to prepare for your signings and then you have to move quickly to get them.
"Sometimes we weren’t doing that."
Benitez has claimed he did not have the trust levels he wanted at United.
He added: "We didn’t have that, so I had to choose.
"Obviously, I had the feeling they were really pleased for me to stay at the beginning, but later on, when we had different views in terms of how to move forward, I couldn’t see this support.
"I couldn’t see this clear desire I could feel at the beginning.
"When I came to Newcastle, they gave me the plans for the new training ground, I was talking to the architect about changing a few things.
"And after three years they painted the walls."
Benitez also stated he had no problems with the limited budget that was on offer this summer for transfers.
The former Inter Milan boss, speaking to the Times of London, said: "I didn’t ask for any money.
"I just wanted to know how much (there was).
"The club put out some information about the budget being around £50million plus the money from sales and that was fine.
"I wasn’t complaining. I knew it was the reality.
"It was about managing the budget you have — that was the key."
Times of London
