Facing the media for the first time since returning to Windy Hill, Thompson said he probably wouldn't have changed anything about his controversial move.
He denied he had been in negotiations with the Bombers since July with James Hird confirming he had only spoken to his old teammate about the role shortly after he was appointed as senior coach after the drawn grand final in late September.
"All I know is that I pretty much knew in my heart that I didn't want to be a senior coach anymore," Thompson said.
"Maybe I told a few people around, a few friends, and it snuck out [earlier than I would have liked] but I was done. I wasn't burnt out - I just didn't want to be a senior coach anymore.
"Sometimes it can affect the way you live to a point and it certainly got to the point, nearly, with me that that was starting to happen.
"It was time to go. End of story. I had done enough. I had done what I could possibly do and I don't think I'll ever coach senior football again. I'm out."
Despite that feeling growing as the year progressed, Thompson said it would have been wrong to inform the club while the season was still going.
"A lot of the focus would have been off the team and our chances of winning another premiership and we weren't that far away last season," Thompson said.
"I just felt it was really important to keep focused to give us the best chance to win.
"As the year went on that I was wearing out. It was really hard to concentrate and try to get the team up to win another premiership.
"Maybe I didn't do the best job I could possibly do, maybe it was a distraction for the team and the club, but at the end I couldn't give my commitment to Geelong to keep going."
Despite guiding the Cats to two premierships during his 11-year reign, the untidy nature of the end of his tenure left many of the Geelong faithful feeling there were questions that needed to be answered about his move to Windy Hill.
"I can just look at myself in the mirror and say that I'm happy with everything that I've done," Thompson replied when quizzed about the move.
"If other people don't see it that way then I'm sorry for them. I'm sorry for you [media] guys if you feel like you've been betrayed because you haven't got the whole truth, but some of the stuff that I have read has been so far from the truth that it's ridiculous.
"I haven't got a problem with Geelong at all. If they have well that's their problem. I just think it's a great football club. We had a great time there over an 11-year period. I gave everything I could possibly give to the Geelong Football Club. I don't think I could have given any more."
Thompson feels his first clash against his old club, who he thinks will remain a force in 2011, will be "just another day at the office".
He went on to defend his part in the other headline grabbing issue of his final year at the Cattery - his relationship with Gary Ablett.
"It would have been an easier year if he had made a decision earlier," Thompson said.
"I was coach at the time and I felt that that was the right thing to do at that time - to try and [get him] to decide because the speculation was just crazy. I was too scared to do an interview because of being asked."
It has been widely reported that Thompson would be joining the Dons as a senior assistant to Hird, but the senior coach denied that was the case.
"No he's not senior. I see us all as being very much the same level with no one being more senior than the other, but with different roles," Hird said.
"There won't be a line specific role for Bomber it will be more around guiding the football department and looking out a bit further than we traditionally do as football coaches.
"[Also] his passion is teaching people how to play football and teaching them the core essence of being a really good footballer so there will be [that] and some longer term vision."
