Why was the National Bank so controversial?

AMERICAN B&T 33 AmeriFirst Bank 6 Bank of Monroe 3 Boelus State Bank 4 Bridge Community Bank 7 capitalone360 9 Citizens State Bank of Roseau 9 DEERWOOD Bank 8 First Citizens Bank of Butte 3 FIRST US Bank 6 First Vision Bank of Tennessee 5 Heartland State Bank 10 KATAHDIN TC 21 North Valley Bank 7 NORTHRIM Bank 15 Ohio Valley Bank Company 12 Port Washington State Bank 4 Solutions Plus Bank 8 US Metro Bank 11 WAFD Bank 9