Onboarding & KYB for new PSPs: Any recent horror stories or smooth sailing?

Curious to hear about folks' recent experiences onboarding with new payment service providers, particularly on the KYB side. Seems like there's always a new hurdle or an unexpected document request that pops up, sometimes weeks into the process. Anyone managed to find a PSP lately with a genuinely streamlined process, or is it still largely a game of 'find the hidden form' and endless back-and-forths? Specifically interested in experiences related to higher-risk industries, as that's where the real pain points often emerge.