It's well documented how those goals come in games where Madrid are bulldozing opposition or from the penalty spot. Last season in late March he still had not scored one goal that would change a Madrid result (counting penalties, amazingly), not sure if he ever did (that was when the stat came out).
Pointless to put those numbers out without mentioning how many came from the penalty spot.
There's a huge difference between playing for Real Madrid when you have the likes of Benzema, Modric, Kroos, Bale, James, etc. etc. playing for you (Ronaldo) and playing for Arsenal where you have the likes of Flamini, Ramsey, Campbell, Oxlade Chamberlain, Walcott, and Giroud playing for you.
Of course Ronaldo was a very good player before his decline, where did I say otherwise? He remained overrated because his stunning egoism and the fact the biggest club in the world always played FOR HIM meant his numbers were inflated, but before 2014 or so he was sometimes the 2nd best player in the world (always a long, long way off Messi though, statistically too if you bother to give the stats some interest and context), when at his peak, and when he could still dribble past my grandma.