We’ve had enough of digital monopolies and surveillance capitalism. We want an alternative world that works for everyone, just like the original intention of the web and net.
We seek a world of open platforms and protocols with real choices of applications and services for people. We care about privacy, transparency and autonomy. Our tools and organisations should fundamentally be accountable and resilient.
Although I no one denies that it's usable, it seems you disagree with
it's creator about whether signal is decentralized
https://whispersystems.org/blog/the-ecosystem-is-moving/
Prehaps you ment to say matrix?