No, he plays great for 6 months and 3 months where he’s clearly better than anyone else on the planet. Which is why the months where you say he’s playing badly are when he’s still pretty much scoring one goal per game and being his team’s best player.
Great, so nothing he does will actually be a big achievement since Juve were 100% going to do it anyway... despite them winning the league by small margins in the past 2 years and not winning the CL by scrapping past the likes of Tottenham.
In 2015 they were the team of Pirlo, Vidal and Pogba when they got to the CL final. In 2016 they got knocked out in the round of 16, in 2017 they got to the final, knocked Barcelona out which these days isn’t that big of an accomplishment and then Monaco in the semis in what was a fairly easy draw, in 2018 they went out in the quarters.
How long until Juve has a better squad than Madrid and suddenly the likes of Isco and Kroos start getting judged on their actual performances? It’s evolving, he’s getting his achievements downplayed before they even happen. I bet by the end of next season Madrid having the best midfield in the world will suddenly not be true anymore and the likes of De Sciglio, Emre Can and Douglas Costa will be better than Carvajal, Casemiro and Bale now that these guys don’t have Ronaldo to hide behind. What’s funny is that the same people already talking down whatever he accomplishes in Italy were the same people downplaying everything he did because he was playing in the perfect environment for him in Madrid... he changed environment and the goalposts moved.