It's not only that. There was a shift in the 70s because plastic became easier to industrially use, and it replaced more sturdy materials like metal. And after that came the electronicization of production, now electronic is less durable then mechanic. The neoliberal revolution made the salaries grow slower than before. Add to that planned obsolescence… all that opened the way for cheaper and less reliable production. Every decade since produced less and less durable things… There's a reaction now, but as the salaries are still low, it's a hard fight.