Souness criticised the goalkeeper for his loan move to the Granata, saying he should have remained in the English Premier League.
“Every day someone comes up to me and they have their opinions," Hart shrugged at his official presentation.
“I don't care what they say. Souness? I'm at Torino and I'm glad.
“We can challenge for the Europa League, and with the support of the fans we can do well. Talking to [Sinisa] Mihajlovic was important, he always tries to make me feel at ease and make sure I'm happy.
“When we met for the first time he asked me about my mindset and my motivations and I told him I wanted to come to Torino and work with him.
“I'm here to learn and improve.
“Before coming to Torino I researched them, and there's a great attack here. I've been received well and I've found top quality here.
“By working well and combining my skills with my teammates we can do well."