Let’s also not forget that inflation is a rate of change. Even at zero, goods and service won’t return to their old prices. That’d be a negative rate of inflation, also known as deflation. If you think the Feds fucked the common person when inflation was high, just wait to see what they’d do to stop deflation (seen as far worse than inflation because it hurts those who hold goods and services - aka the rich).
This is more accurately a right wing talking point about Bernie. A quick search will turn up many articles such as this one from the 2016 elections. One thing to keep in mind is that he doesn’t introduce as many bills as some of his peers, but has had great success in passing amendments to bills.
Perfect? No. Unaccomplished? Absolutely no.