Is Raydium Decentralised?

Could you please clarify whether Raydium is truly decentralized, or are there certain aspects of its operation that are centralized in nature? It's important to understand the extent of decentralization in order to evaluate its security, resilience, and trustworthiness as a cryptocurrency platform. Can you provide more insights into the architecture and governance structure of Raydium, and how they contribute to its decentralization?