Jansson, 30, spent three seasons at Leeds. But in the summer of 2019, he was sold to Brentford.
He called to Fotbollskanalen : "I had that feeling all that year with Bielsa. I first arrived late after the World Cup, last of all. It was not that I demanded it, but I asked for a vacation, because I know how important rest and recovery is in football.
"I asked for an extra week after the World Cup. But I feel that it went wrong now when I look back on it in retrospect. He did not like it at all.
"Then I had a pretty tough start in the first matches, I was not allowed to play, for understandable reasons, as I came in late and had barely gotten into his way of playing. Then I was a bit lucky with injuries, started playing and played at a high level throughout the season. He himself mentioned that I was the best player of the season. He liked me incredibly much as a football player, but he had a hard time with me as a person."