Onboarding Friction for Scaling Fintechs

We've been scaling rapidly, and the bottleneck isn't our tech anymore, it's the sheer friction involved in onboarding new institutional clients. Specifically, the KYC/B requirements across different PSPs are wildly inconsistent and often manual, causing significant delays and resource drain. We're talking weeks for some, even with all documents in order. Is anyone else finding that what looks like a smooth API integration on paper for payment processing still hides an archaic back-end on the compliance side when you hit any scale?

It makes selecting new partners a nightmare when you can't accurately predict the true time-to-live for a new client due to varying internal due diligence processes. It feels like the industry talks a good game about 'seamless onboarding' but the reality for anyone handling non-trivial volumes is far from it.