The 26-year old right-back left Newcastle United recently to pen a deal with the relegated R’s and has been criticised for heading to London in search of a bigger pay packet.
But Simpson has rubbished those claims, saying he wanted regular first team game time and felt he would not get that at St James’ Park following the arrival of France international Mathieu Debuchy from Lille in January.
“There weren’t any arguments (with Newcastle)," he told reporters. "It’s football – these things happen.
“The fans need to know I wasn’t being greedy.
“It was just one of those things. I think the club wanted to go in a different direction. I knew that even when they offered the contract.”
He added: “I knew someone was going to come in. Mathieu came in and I didn’t want to be sat on the bench.
“I’m 26 and I want to keep playing football. I’m not one of those players who’s happy to sit on the bench and take the money.
“I want to play football. I buzz off playing every Saturday. Sometimes both parties need to move on. I just want to say thank you to everyone and move on.”