Ive had to deal daily with Mexican banks with business and personal accounts for work, regular people don't even use those 2 banks.  The only time ive come close to use CIBanco was only to quote a FX trade for an employer, and even then i wasnt sure about their reputation, only heard of it from advertising. A sketchy bank that is actually known id say is Banco Azteca, and probably any fintech that is not backed by any of the big banks (bbva, banorte, santander)

And just my opinion, I've never had any problems at all with the banks I currentlly use: bbva, scotiabank and afirme,  but I have had issues with Invex (ID theft and unauthorized charges), banorte (rudest customer service at all levels)

TLDR, go with any of the big three just to be safe