I don’t think you quite understand what ‘decentralized’ means. Decentralization means there’s no central server, implying no data collection, no restrictions or moderation, and no banning.
Furthermore, it won’t corrupt when a single node breaks down. This is because a decentralized network is essentially built by all users within the network. Whenever one user quits or a node breaks down, there are always other nodes/users available to maintain the network. That’s the essence of a decentralized network.