Phil has been fighting major depression since his health issues basically forced him to retire. He's no longer physically capable of playing or even singing anymore without a lot of pain, so he just doesn't do it. Anyone who's seen any videos of him playing the drums has noticed that weird, slouching position he always adopted. Well, 30-40 years of playing like that has caused permanent damage to his spine.
I imagine him sitting around, bored, lonely, and clinically depressed, and firing up some old videos perhaps in an attempt to relive the glory days, and hating the person he sees on screen. He does have something of a point: for a while, he was fucking everywhere, doing everything, playing on everyone's albums, producing everyone's albums, including his own, and yeah, a lot of people got pretty sick of him. That's the nature of the business; when something or someone is hot, they beat it to death, until no one likes it anymore. Rather than simply be embarassed by his overexposure, or even proud of his many accomplishments, he instead empathizes with all those who say they hate him.
It's sad. He was amazing, and he has a great legacy, but in his depressed state, he only focuses on the negative.