The Spaniard joined the Blues from Real Madrid last term, and after scoring in his first six league games, he stalled and only ended up with 15 goals all season.
The 25-year-old, who has started every game this season, says he prefers playing under new manager Maurizio Sarri.
When asked if he was happy with Sarri's style, Morata told Caden SER, "Yes, yes, yes. For me, yes. It's not for nothing, but for the style of play. It wasn't my style of play and I suffered a little because of that."
Morata also commented on his struggles in the second half of the 2017-2018 season with the Blues.
"In today's world, it's normal that these [critical] things are said," he added.
"Chelsea made a huge effort for me and it wasn't returned. I should have repaid them double. A player they pay for can't finish the season with 15 goals.
"People think we're machines. If I had stopped for three months, I would have come back with a clear head, but I was professional and I wanted to give everything.
"If I could go back, I would stop for two months. I was in pain, I went to Germany to see the doctor, paying for private planes. People believe the false life of Instagram, what it shows you; they thought I was at home with my wife. Some day I'll write a book about what I've been through."