In video games, just like in all other products of human toil, 90% of everything is crap.
90% of the games today are crap.
90% of the games in the 1980’s were crap.
The reason the games in the 1980s were so much better is that there were so many games being made (they were cheaper and quicker but no means easier) and therefore, there were more good games being made than bad games being made.
But 90% of them were still crap.