HA!! We called Ratt, Poison, Twisted Sister and the like "Hair Bands" to differentiate them from "true" metal like Judas Priest, Iron Maiden and Sabbath. Yeah, I couldn't listen to metal after Motley Crue did Home Sweet Home and it infected the airwaves like an STD. It ruined the tonality for me. I came to resent slinky strings and too much reverb and distortion, and moved toward Chicago and Delta Blues, Classical, "Alternative", Big Band, 50's, 60's, & 70's rock and indigenous music.
It may be a generational thing, I was born in 1970, and some genre labels do come after the fact. What I called rockabilly one day my mother said was just rock-n-roll when it came out. DRI's DWI was punk, Cryptic Slaughter was Speedmetal, Corrosion Of Conformity was just awesome! Suicidal Tendencies' (for the first album) vocalist is almost indistinguishable stylistically from, say, Zero Boys and fit under American hardcore Punk. Its only looking back that I call it punk/metal. I had listened to the Ramones since I was like ten. The rest, as you say, we called speed metal and if they grunted and you couldn't understand the lyrics at all it was Deathmetal. I had few and far between encounters with Metal after 1986 or so.
I have not heard COC in decades and it was a real treat to hear it again. Today, I can see how the different styles co-existed on a continuum and branched out from common influences and evolved over time. Thanks for indulging a music Nazi.