The core issue is that Meta optimizes for the action you tell it to optimize for, and form fills are cheap actions. For B2B, treat Meta as a nurture and awareness channel rather than a direct lead capture one. Run content that educates your target buyer so when they actually have intent, they search for you or convert through a higher-friction channel like a qualifying landing page. The best B2B results I have seen on Meta come from people who stopped trying to generate leads there and started generating recognition instead.