The 80's weren't crap. The 80's saw a massive increase in wealth for the working class. There was even a whole comedy character about it - https://knowyourmeme.com/memes/loadsamoney
Yes. The Thatcher era marked the end of a lot of stagnation, and while at the time people might have linked her and the era, plenty of subsequent people don't like Thatcher despite the marked increase in quality of life post her era.
The 70s were crap because of high inflation and fuel costs. Winter of discontent etc.
The 80s were crap because Thatcher basically dismantled the working class.
Is it dissonance about Germans complaining about interwar issues and complaining about the leader they ended up with?