How so? How many televisions do you have now vs 1980's?, 1970's, when do you want to have the timeline. How many personal computers, cell phones, cars, clothes, how many more people have gained an education now vs then, on and on. Add in the millions of people that have moved into the middle class since that time too and the middle class has actually grown too.
There are peaks and valleys, but things improve overall generally. Bernie is ok, but as a senator, as a President he wouldn't get anything done and would just be a lightning rod for people that are easily scared by the word 'socialism'. Which is why the Russians push for him.