The problem with decentralised software is that you don't want to host other people's illegal content. I once tried out zeronet, which downloads the entire decentralised website and anyone can post things to it. Although I have not found CSAM directly on their Reddit equivalent, there are people posting advertisements to zeronet CSAM sites. The idea that I am downloading and automatically redistributing content like that is disturbing and zeronet is dead for a good reason. It's a pool that is asking to be peed in, even if the abusers themselves are a tiny minority.