Pop music had an interesting path in the 1970s. The Beatles broke up in 1970 and a lot of bands fell into serious drug abuse which really derailed groups like The Rolling Stones and The Who. Then some groups just did soft pop, like Bread, and some moved into country rock, like Gram Parsons and the Eagles.
Then there was disco, followed closely by punk and New Wave and a few one-off bands like Golden Earring and their classic Radar Love.
But a lot of it was just crap. Some of it was fun crap, like Afternoon Delight and Talkin’ Baseball but a lot was Bobby Goldsboro and Debbie Boone level bad and that’s about as bad as it gets.