They were famous way way back ....before you had taken a first breath even..
not now.....your judging them like they just got in the hit parade....
Lets look at what was good back then
https://en.wikipedia.org/wiki/Sex_Pistols
whether you ever liked or not is completely off course...they started the Punk Movement in the UK......
https://ultimateclassicrock.com/sex-pistols-songs/