Is THETA decentralized?

Could you please elaborate on whether THETA is truly decentralized? I'm interested in understanding the underlying architecture and mechanisms that contribute to its decentralization. Is the network distributed across multiple nodes, and how does this affect its operation? Additionally, are there any centralized authorities or entities involved in the management or governance of THETA? I'm curious about how these factors might impact the overall decentralization and security of the platform. Thank you for your insights.