He had 4 goals in his first 14 league games last year at Madrid. So he's been far better here than that to start the year. But hopefully his slow start last year too is indicative that his finishing and game play is going to take a massive leap come the important part of the year and start destroying every opponent.
CR7 can do whatever he wants in Serie A as long as he does his job when it matters - in CL. He showed the same mediocre level in Madrid during the first half of the season, it's no different here. Just wait.