Go on, tell me how Wasabi coinjoins are "critically flawed".
Oh, my bad! Apparently coinjoins failing completely at what they are designed to do and having outputs which can be 100% linked to specific inputs is not a flaw.

Why does it matter if a coordinator buys data from someone else?
Lol. You have already made it abundantly clear that you have absolutely no issue whatsoever with a so called "privacy" solution actively funding blockchain analysis, mass surveillance, and censorship. In any rational persons' book, these things are mutually exclusively.