[Getty Images]Defender Ruben Dias has been reflecting on a "frustrating" season that he says Manchester City can use as "gasoline" before they take on Crystal Palace in the FA Cup final this Saturday.For only the second time in eight years, City have failed to win the Premier League title as they currently sit fourth in the table, but Dias is confident they can take away the positives. "The way you feel a loss, it hurts, it's not a nice feeling," he told BBC Radio Manchester. "But they push you