The Tynecastle club alleged the winger developed an attitude problem and rejected multiple offers of a new improved contract.
But the 23-year-old, who scored twice as the Gers beat Elgin City in the Irn-Bru Third Division yesterday, said: "I'm not too fussed about what they say. I'm just concentrating on playing well for Rangers.
"That is what they think it is. I don't agree with some of the stuff they said. For instance, I was only offered one contract.
"People don't know what the reasons are. I think they are just doing it to cover themselves. I am looking forward to being at Rangers.
"I am hurt by it. I was there for five and a half years. While I was there, I gave everything, no matter what. That is what I will do at every club I play for.
"I am always going to give 100%. It was disappointing seeing it. But it is behind me."
Templeton's anguish at the parting shot aimed at him by the Tynecastle club disappeared when he made his debut for Rangers yesterday.
Cheered on by the home support in a 46,015 crowd – the largest in Scotland this weekend – he netted a goal in each half in an emphatic 5-1 win.
He added: "I feel I have made the right decision. Look at the fans who were at Ibrox yesterday.
"We had over 45,000 and we are playing in the Third Division.
"It is unbelievable to be here. It is a European club, not a Third Division club. I am sure we will get back there.
"Hopefully, we can do it as quickly as possible."