Former England boss Steve McClaren has hit out at club owners, claiming they run football clubs like they are a "business".
McClaren, who has been out of work since leaving FC Twente in February, was Nottingham Forest manager for just ten games before unceremoniously departing with the club.
And the former Manchester United assistant feels managers do not get enough time to put their own theories into place.
Speaking to Yahoo! in a press release sent to GiveMeFootball, McClaren said: "Today you get a lot of owners who are successful businessman, some of whom billionaires, and they think they can run a football club like they run their own business.
"The majority of business people coming into football are successful, so when they take over a football club they automatically expect it to be successful.
"All managers need time, we need time to create the right environment and to put our own culture in place, time to work and develop players. Everybody wants success and they want it immediately, people think that success will just come overnight, invariably it doesn't."
The ex-England boss failed to get the Three Lions to Euro 2008 after replacing Sven-Goran Erikson - a failure which would ultimately cost him his job.
McClaren feels more needs to be done at grassroots level, and that the National Football Centre at St George's Park should be the catalyst.
"English players are well known for their physicality and mentality but I think we need to add that technical and tactical aspect if we are to develop our game as well," he added.
"St George's Park sends a great message to English football, to the supporters and to the world that English football is developing the game. We need to make sure we get the right people in and coach them properly so that we can teach our talent the right things."
The 51-year-old has also given his verdict of which players from the Dutch league could make the grade in England, and admits that Leroy Fer was devastated to not complete his January move to Everton.
He said: "I think one of the main reason Twente and I were on a little bit of a dip in February, and resulted in me leaving, was because we were selling on the players who I thought was perfect for the Premier League, Leroy Fer.
"That fell through for medical reasons and it was a hindrance to us because he was very disappointed not to get the move. We also had a centre half called Douglas, who many Premier League teams have been chasing for a long time. Nacer Chadli also."
Talking about what his next footballing chapter will be, the ex-Middlesbrough chief is unsure where he will end up, but confident he will make it a success.
"I am always looking for the next challenge but I don't know what that's going to be," he added.
"I still think I have a lot to give on the managerial side and I still think I have a lot to give to other coaches. I still have the energy, attitude and appetite and the passion to stay in football and make my next challenge a success."
For more insight from Steve McClaren and other leading managers plus exclusive Premier League highlights go to www.yahoo.co.uk/sport
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