Oh, he is a complete asshole. And don't bother wondering whether he nicened up when he got older or got sober. At least in the Bangs interviews he had the excuse of being null and void on junk, speed, and booze, and you can't say Bangs wasn't provoking him. (Bockris is kind of a scene-making worm himself though--researches sloppily and writes trashy books that seem to accept any gossipy tidbit no matter how dubiously sourced.)
Weirdly enough though, given Lou's legendary assholery, I once sat in Jimmy's Bar near Times Square listening to two dudes talking next to me. One said he was a recording engineer, working with Lou Reed on what later turned out to be Ecstasy. This guy said Lou was a really nice guy, fun to work for. That one day, Lou came in to the studio and announced that he didn't feel like working, he felt like going to Coney Island. So the band and the whole recording crew spent the day eating Nathan's and sitting in the sun at Coney Island, all on the clock! What a guy!