Arguments that doubts the origins and not the technical merits are very poor arguments. That’s a slippery slope that can go to any absurd extreme such as asking what’s the proof that CurveCP is free from nation-state pressure because of author’s citizenship?

QUIC, despite its warts, is an open spec that anyone can review. The cryptography is based off TLS 1.3 and to prevent ossification it is fully encrypted (sans two sequence numbers). It’s really easy to read spec - really, try reading it.