Armanino is not a top firm. If you're not using Big 4, there's a reason.
I've routinely joked to my wife that her life would be much easier if they fired their auditors and went with BDO or some smaller auditing that they could bully around. The thing is, that's exactly how companies with weak accounting think, and FTX proves that point.
All the big 4 have been caught turning a blind eye over the last few years to win big contracts. Wirecard, Carillion and NMC Health all spring to mind for me in Europe. If i have 3 committed to memory there are many more.
All the "audit" firms are corrupt, regulation has utterly failed.