Paolo di Canio felt Sunderland lacked direction from upstairs during his time in charge.
The Italian lost his job last season.
Asked whether he would do things differently if he had his time again on Wearside, Di Canio added: "many things" - laughing and smiling as he said it.
He told Sky Sports: "I analyse myself but we focus more on some things rather than other things.
"When you arrive at this club in the Premier League you have to make the revolution because my idea was to make a revolution, not only for the players.
"I wanted to change the habit because in a big club like that it's not easy. To be honest the problem was different because there wasn't a clear idea where to go.
"We had a project but at the end of the day I was sacked after five games.
"If I'm not wrong the two Italians who brought all the players in walked out in January (following Di Canio's dismissal in September 2013).
"There was no clear idea.
"Before me three managers were changed in two or three years so if every time you've got a problem you're going to change everything, it's difficult to be something potent.
"It's obvious in terms of mistakes I made there are a few for sure, not only off the field but also how to lead my players but it's all experience to improve for the future group that you are going to approach."
