However, Davis was one of many jazz musicians growing dissatisfied with bebop, seeing its increasingly complex chord changes as hindering creativity. This is a debatable point; bebop was ten years before KoB anyway. Are you referring to the music that grew out of bebop? And how specifically? I think this sentence should be rephrased:

"However, Davis desired to bring a more lyrical quality to the forefront in his music[1], a quality which was not emphasized as much in bebop and post-bop jazz."

[1] This desire is verifiable in numerous sources  off the top of my head, John Szwed's book, and Miles' autobiography.