The Spain striker endured a difficult spell following his £50million move from Liverpool in January 2011, finding himself on the fringes of the Blues team. Torres revealed in an interview with El Pais that led to him becoming disenchanted with life at Stamford Bridge.
He told the Spanish newspaper: "Halfway through last season, I distanced myself from the values I had grown up with. I had team-mates who didn't care if the team won or lost because they were not playing. I never wanted to be like that - [But] one day I discovered that I was like them, that it didn't matter if we won or lost if I was not playing."
Torres added: "I wasn't part of the group. I discovered that I was not happy because I had stopped being what I had always wanted to be. In the dressing room, you can never lose that group concept.
"But I learned to look at myself and to realise that the only person that can change is you. The only person who can say: 'You're making mistakes, you've got to do something' is you."
Torres, 28, feels the switch of management when Roberto di Matteo took over after Andre Villas-Boas' short tenure offered a fresh start.
"When we changed coach [and Roberto Di Matteo took over] it was a bit more similar [to Liverpool manager Rafael Benitez's style]. That had a good side to it, which was that I learned: I became a better player," he added.
"I can now do things that I was not able to before. You can be the player that your coach wants, but you're not the player that people expect you to be. I spoke to Steve Holland, the [Chelsea] assistant, a lot and we worked hard on it.
"I became more mature, I came to know myself better and became conscious of the fact that it depends on me.
"I learnt to be more self-critical, to understand everyone better and to accept the situation. I learnt that if we won it didn't matter that I hadn't played. I had to keep working."