It's a bit contradictory. The author says:
1st opinion, goals. Messi has more goals because Cronaldo is winger and his main duty is to pass and assist goals not make them. You cannot compare.
2nd opinion, assists. Messi has more assists because he passes more. You cannot compare.
Cronaldo is not doing what he should or what? There is also miscalculation due to partial or wrong data. Messi's goal per game ratio across 2 seasons was atm 1.16 not 0.88 and Cronaldo's 1.06 not 0.90.
The author is right though when he says goals are not sufficient factor. Still, author compares goals and assists separately. If you add assists, you can compare contribution to game better, to put it simply: you can compare wingers and other forwards. Messi and Cronaldo.
3rd opinion about team reliance is not very interesting but 4th about attitude is nonsense. He whines about people not liking arrogant sore loser and preferring modest and humble player. I have not heard anybody saying Messi is better player because he is humble. Then again 5th opinion, silverware, I agree. Individuals do not win trophies, that's what teams do.