ALICE has done good work here[0] in calculating a realistic inflation rate, and it contrasts quite a bit from the official CPI. I've also read that the 1990s changes to the CPI drastically cut the official inflation rate by excluding more things from the calculation. If that had not happened, inflation would have tracked more realistically to the average person in the US

[0]: https://www.unitedforalice.org/essentials-index