He was a genius, and too talented for the band. I recall watching a documentary where they discussed his vision for the music, and what he heard in his head for how the songs should sound, and he knew The Beach Boys weren’t talented enough to record it. He had to bring in the Wrecking Crew for the recordings because of their abilities, and they even said Brian was tough on them. He micromanaged every note. He had a vision and a sound in his head, and he couldn’t stop until he achieved it.