The Spaniard joined Chelsea in 2011 for a British record £50 million - but has never truly lived up to that price tag.
In his three-and-a-half seasons with Chelsea he's managed just 20 Premier League goals, which has prompted speculation that current boss Jose Mourinho could sell him this summer.
In an interview with French magazine So Foot, Torres says he has often wondered about why his form at Chelsea dipped from his Liverpool pomp, and admits to having never felt as though any manager in west London has trusted him because of the time he's spent on the bench.
"Today, I am a different player but I am not going to lie to you: the player that I was, the one who started all the matches with a guaranteed place, I really miss sometimes," Torres is quoted as saying.
"At one point, I even sat myself down to watch videos of my goals: I wanted to understand what I was doing before when I was scoring.
"I concluded that the only thing that had changed was the colour of the shirt. Everything is a question of adaptation to the playing style of a team. There are the styles which suit me well and others less, that is all.
"When you play, you do not ask yourself how it feels to be on the bench. You have to live it to understand how difficult it is to be there without being there. To enter a match knowing you do not have the confidence of the coach. To play when you simply don't have the habit of playing.
"I felt bizarre, I had the feeling of getting tired quicker, of being heavier. I had no gas. You have to fight against a lot of things to get off the bench, sometimes even against yourself."
The Spaniard, who is hoping to earn a spot in Spain's final World Cup squad for the tournament in Brazil next month, says his first few months at Chelsea set the tone for his time with the club.
He claimed: "Before my arrival, Chelsea played with [Nicolas] Anelka and [Didier] Drogba in attack. I arrived to play alongside Anelka in a system with three midfielders. We played only one match with that system.
"At the time, David Luiz and myself went to see [manager Carlo] Ancelotti together because we had been the last arrivals, we were told we would be important, but, in reality, we weren't playing. They finished by saying to us: 'We are going to finish the season with the team that started it'.
"I understood nothing of what had happened. I started to get to know the bench. I reassured myself by saying things would soon change. [Andre] Villas-Boas arrived, then [Roberto] Di Matteo, but it was always the same: one day I played, the next not."
Torres and his fellow Chelsea forwards were partially to blame for the club's lack of silverware this season - and Mourinho is expected to bolster his attacking options in the shape of Atletico Madrid forward Diego Costa.
"Clearly his [Mourinho's] aim is to sign another attacker for next season," Torres said. "But I am going to continue to work to make him change his opinion.
"There is not a lot to analyse. It is not possible to read it another way: he is not completely satisfied with our performances and that is all. All that is left for us to do is to prove that we can be the striker he is looking for."