It's not that Biden hasn't done enough, he's done quite a bit to reverse the slide Trump put us in.
The problem is that the things he's done aren't where your average voter can see them. The big Infrastructure deal is largely invisible to your day to day voter.
I still see $6 gallons of milk at WalMart. My gas is still $5 a gallon (my fault for needing Supreme), Biden has done NOTHING to address these basic pocketbook issues and when he does hear the complaint, he discounts it, saying instead "the economy is great!"