You can see his interview at Terror Time. Here are some choice quotes.
“One springs from an organic idea and has a truly artist’s eye working.” He continued on, comparing Friday The 13th and Texas Chainsaw “And Friday the 13th, I feel, affects me as very cynical. It’s very cynical moviemaking. It just doesn’t rise above its cheapness. I think the reason that all these slasher movies came in the ’80s was a lot of folks said ‘look at that Halloween movie. It was made for peanuts, and look at the money it’s made! We can make money like that. That’s what the teenagers want to see.’ So they just started making them, cranking them out…most of them were awful.”Of course 'most of them were awful' is a verdict that can readily be offered on almost any decades genre offerings. But I do think he has a point about the Eighties. Very few of the horror movies of that period have worn well. Yet much of the science fiction has endured and some - Blade Runner, The Terminator, Aliens, Close Encounters - are regarded as classics of their kind. They set templates and standards in a way that Seventies horror did.
Perhaps that's the real issue, that the ground-breaking work in horror film had already been done by Carpenter and others in the mid-to-late Seventies, leaving the way open for hacks to rip-off all the money-spinning tropes. Oh well. One of my favourite horror movies is an old-school ghost story that kicked off the Eighties. If only that standard had been maintained.