Yes, La Liga is a joke league. The government and Spanish FA have quite literally funded Real and Barca whilst neglecting all the other teams, meaning that up until a few seasons ago, it had been completely dominated by two teams.
Eredivisie, at the time RdL was playing, had some of the best talents in world football. RdL was playing for PSV during a time when Ajax were winning European cups.
So yes, you can't disregard RdL's time at PSV as irrelevant and yet still somehow expect credibility to be shown towards CR playing in one of basically two government funded teams. In 2016, for example, CR scored something like 14 of his goals against two separate teams.
Irrespective of this, you are making statements about "better seasons", which is a statistical comparison and completely futile. The original point myself and others in this thread have made is that anyone who actually watched RdL play would easily see he was a superior player prior to his knee injuries. There aren't enough spreadsheets, statistics, and calculators in the world that credibly represent a brilliant footballer - some things are down to pure observation.