Diame made the move to the KC Stadium on Monday following two years with the Hammers, and is looking forward to playing in his favoured central midfield role.
The 27-year-old believes he was misused at West Ham and as a result was not able to show his best form.
Diame had been keen to attract the attention of top clubs and admits he had hoped to move on from the Hammers much earlier.
"At West Ham I was shunted around all the different positions," he said, quoted by the Daily Star. "I remember one time I had to play as a striker.
“That was not good for my career. I wanted to play for a club that is high in the Premier League table.
"At least with Hull I will be certain of playing in my favoured role.
"I should have left West Ham a long time ago, as with them I wasn't permitted to play in central midfield.
"I wasn't able to get the biggest clubs interested in me, as when they came to watch me I'd been put in a position that was not mine.
"You lose your bearings when you get shunted around all the different positions."
Hull face West Ham in their first match after the international break on Monday, 15th September.