So let me get this straight - you used a mixer, the mixer mixed your coins exactly as they said you would, you deposited your coins on a centralized exchange, the centralized exchange decided to lock your account, and so you post a warning about the mixer? Your mistake wasn't in mixing your coins - your mistake was using a centralized exchange which attacks the very essence of bitcoin by treating it as non-fungible, by discriminating against certain coins, and by censoring certain outputs.

Why is no one questioning this? In what other scenario would this be even remotely logical?

I sold an old laptop to a friend for cash. I used the cash to pay a builder who was doing some work for me, and he disappeared without completing the job. Beware of selling things to my friend!