Onboarding Friction with Smaller Brokers for Niche Products

Anyone else finding that while larger firms have streamlined their KYB processes, the onboarding for smaller, specialized brokers or prop firms, particularly for less liquid products, remains incredibly cumbersome? It's often a case of inconsistent document requests, multiple rounds of submissions, and significant delays, which eats into valuable time. I'm wondering if this is just the nature of dealing with more niche liquidity providers or if there are specific red flags I should be looking for during initial due diligence to avoid these kinds of bottlenecks.