Has inflation really hit you hard these last 4 years?

I don't understand how the stock market hasn't crashed with Biden in office. We have wars happening and it doesn't seem to affect the stock market one but.
Is what Americans paying such high prices for everything, especially groceries and electricity and gas helping the stock market at our expense (literally)?
All of a sudden my friends retirement account has gone downhill to almost nothing in the last 4 years. He, not I didn't account for inflation to happen years ago and he thought he'd be ok financially. But now, we are terribly worried about how (we're) going to survive when his retirement is gone!!
This is a frightening and very scary thought and something to lose sleep over.
It just crept up on us and we don't even buy anything except food, gas, rent, car insurance and phones.
We are scared 😨 and don't know what to do.
There's not even anything to cut back on.
Any suggestions?
Has inflation really hit you hard these last 4 years?
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