If their number is cherry-picked, give a real number yourself. Anecdotally, my grocery bills are easily 30%+ from what they were last year, and the same is true for many people I've asked.
Compare 2022 to 2019 and look for the average change over three years. That's the real signal over the temporary noise. There are still some real effects, but it's much smaller than all the one-year-over-year numbers seem to indicate.
https://www.cargurus.com/Cars/price-trends/
...you can select the start date for the chart as early as August of 2010. Price increases starting in late 2020 don't look illusory to me.
In regard to car prices, I would say that the prices themselves contribute to the inflation statistics, but they are not caused by inflationary pressure.
The right comparison is to look at 2022 compared to 2019 and see if it looks out of line for a three-year period. A few things are, but most aren't.
Also, citing one grocery chain is a cherry-picked outlier. Cite them all if you want a real number and not an artificial illusion.