You are clearly finding mainstream/libtard sources on this, because anyone who claims the 70s were better than the 80s is either lying, or didn't live in either decade and is repeating lies. In recent years, libtards have begun rewriting the history of the Carter years to make it sound like a period when the middle class thrived and everything was great, when it was actually a period when inflation was so bad that nobody could get ahead if they weren't extremely well-connected, and America was on retreat everywhere in the world because of our incompetent, feckless leadership.
In the 1980s, we had a brief, sharp recession as the economy readjusted to significant structural changes imposed by Reagan and Volcker (who ironically didn't see eye to eye). At the time, the media shrieked and screamed that omg, some numbers went down, but the reality is you can't fix something as bad as the Carter economy painlessly, and afterward, we had about two decades of good times.
If it sounds like I'm just talking about now, but with different names, well, the 70s and the 2010s have a lot in common. In 25 years, libtard historians will be claiming 2020-2024 was the best America ever had it. In fact, they're already trying to claim this.