He doesn’t sell like a top 5 artist
Half of his stuff is forgettable.
you yourself admitted you can't name more than 10 Kendrick songs
Section 80 although it didn't chart well was very universally well acclaimed as a piece of western hiphop
TPAB and GKMC are two of the few 2010s albums considered classics already, the first is considered one of the greatest albums of all time
DAMN has Kendrick's biggest hits till recently and it was huge.
Mr Morale is one of the most prominent introspective albums in hiphop history
since 2011 the only Kendrick projects you could argue as being forgettable are Untitled Unmastered(which is just TPAB leftovers lol) and the Black Panther Soundtrack(one of the biggest movies of the 2010s)
do you believe, if he died today, any of his albums would go diamond?