There was a large credit union in Texas that was in conservatorship for four years because 1)there was no way to inject capital and 2) the Credit Union regulator didn't have sufficient funds to actually resolve it (pay off depositors). So they rocked along until they were able to squeeze enough out of the members to write off enough bad debt and return control to the members.
Nothing is perfect but if I have to choose, it’ll be a credit union over a bank to hold my money.