He has always regarded himself as a "musician" and I would expect him to respect other musicians - if they can deliver. His ire has generally been directed towards media and business and record company people ie those who aren't artists like himself. But he himself and no other has made some calamitously stupid decisions and he has only himself to blame - not that he ever did. He used to argue all that mattered to the world was the "work" and nobody need know anything about him, but he still expected people to give him their money. Well it don't work like that man...
In recent years he has become milder but now he produces and controls his output if nobody buys his
stuff he can no longer blame everybody else for crushing his muse.
I did once have lunch with somone who knew him - but they were from Northern Ireland so may have been biased.