I’m gonna let you in on a little secret: rap is all more or less the same. Becoming good at any aspect of music is pretty difficult, but becoming an acceptable rapper is pretty easy. Same with producing rap. Making rap is comparable in difficulty to make those indie ukulele college girl type music (unless you’re playing in the traditional Hawaiian style, ukulele is also pretty easy to become good at).
So what critics do is every so often they pick a rap album and declare it a masterpiece. They’re interchangeable though. Igor was picked that year, but Igor is no different from Kanye’s Jesus is King or Iggy Azalea’s In My Defense from that same year. It’s all a charade
Pic related is another example of an arbitrarily chosen “work of genius”