@Natanael enshittification is about power, and ATproto is designed to look decentralized but enable secondary centralization where it matters for power dynamics in the network, in a way that the Fediverse very much doesn't:
https://rys.io/en/167.html
(shameless plug, I wrote that, but it dives somewhat deep into the "why" of what I said above)
tl;dr it doesn't matter which PDS you use if everyone is still beholden to the same entity that controls the "reach" layer in BS.