This is a masterclass in deception. Here's the actual, plain English translation:
"U.S. GDP growth averaged 2.05% during the four year period beginning in 2020."
But 2% GDP growth per year is subpar, and we're trying to make it sound great! Well, folks are familiar with annual GDP stats, so giving them annualized stats makes comparison easy. To prevent this easy comparison, we won't annualize it! Instead we'll say:
"U.S. GDP grew by 8.2% during the four year period beginning in 2020."
But there's still a problem! 8/2 makes for easy mental math. The reader can still easily realize that we're talking about a paltry 2% growth. How do we handle this? Easy! More obfuscation!
"From the end of 2019 to the end of 2023, U.S. GDP grew by 8.2 percent."
Now the readers is two operations away from being able to compare the data!
The greatest trick of all, of course, is that this odd formulation invites misinterpretation. Since we almost always talk about GDP growth in annualized terms, this sentence can easily be misread as saying "U.S. GDP grew at a rate of 8.2 percent from 2019-2023". In my opinion, this misinterpretation is practically demanded by context, as the actual (2%) figure does not fit into the glowing narrative at all.