How many times can I explain this

coordinator is blinded couldn't/doesn't know if Alice or Bob is submitting the output Zerolink (chaumian coinjoin) is based on this hypothesis. The idea being that Alice registers input, Bob registers output, when the coordinator asks Alice if her output is in the tx & to sign, she forwards that to Bob, Bob validates, Alice signs, Alice has no idea which output is Bob's and Bob has no idea which input is Alice's.

The Tx0 makes all your UTXO's share a tx hash, which prevents them from mixing with each other, preventing an "accidental" Sybil attack from entering a large amount of BTC, Samourai separates the coordinator fee in the Tx0 no fee flagging in the fee addresses.

Whirlpool client can only submit 1 UTXO per pool for remixing. Once that UTXO has been selected for, and undergoes a remix, another one of the UTXOs in the same pool moves to the front of your queue and gets registered for a remix