I understand that fintech is a broad term, I didn't want to narrow onto a niche to solicit wider conversation. Particular niches could include banking, wealth management, debt or credit management, budgeting, payment api / integration etc. I'm not sure myself.
- fake crypto (in reality it's CFD but they market it as crypto) (revolut)
- exchange rates worse than MasterCard for non-major currencies (revolut, just read their forums)
- blocking your account and requiring further documents (KYC, AML) if you want to access your money after you deposit more money
- exchange rates not public anymore (today exchange rates are accesible only to customer, not public) (revolut)
- no online banking, android/ios only
- when you start utlizing the cheaper services they actually provide you get harrased by the "compliance team" (because their are losing money so they can compete) (bunq, monese)
- low limits and when you reach your limit your account get be terminated (monese)
- no free API accessible to the customer (just some oauth api you can not use)
- expensive fees (transwap, ofx)
- horrible support
- no airgap security (think german PhotoTan or dutch ING scanner)
- expensive ATM withdrawals