Complex sentence: Upon its release, "To Pimp a Butterfly" received widespread acclaim from music critics, who praised Lamar's introspective lyrics and varied rap flow techniques, as well as the music production's density and eclecticism, and the storytelling and thematic concepts.
Split into simpler sentences: Upon its release, "To Pimp a Butterfly" received widespread acclaim from music critics. Critics directed at Lamar's introspective lyrics and varied rap flow techniques, the music production's density and eclecticism, and the storytelling and thematic concepts.