Go to another bank or go to CashApp or TransferWise (now called Wise I think) or any number of the dozens of apps-masquerading-as-banks and get a new set of ACH details. Get the $2,300 you're owed.
This learned helplessness is not helping anyone. There are still regulations, laws and rules that empower you as a consumer and business partner. Use them or lose them!
You're asking the article writer to spend their own money/time by skipping the free attempt to "show the big giant they're wrong and save the next person time".
Personal choice for sure.
Would I do it? Not by choice.
Also fees to file a small claims action are usually less than $100. And you can ask for that as part of your renumeration if you win your case.
They've told him what they want: a bank account. So...give them another one? If the author wants to keep spending hours trying to get $2,300 to go exactly where he wants and debugging Amazon's system, he is of course free to do so.
Me, I would have done one thing he did--remove Amazon Pay--and gotten my $2,300 four weeks ago. That's not a criticism, just a difference in tactics.