Tor have some problem about correlation attack, don't get me wrong I love Tor and what they're doing, they're to stay. Experimenting on Nym is pretty cool though

And yes Nym is pretty decentralized, it's a very new project so the real decentralization is on it's way

There's an article about this https://blog.nymtech.net/vpns-tor-i2p-how-does-nym-compare-8576824617b8