Sam Bankman-Fried is a criminal and deserves to go to prison.  That does not mean it sucks morally to use his money, just as it does not suck to use cash which directly come from cocaine and heroin sales.  You have probably used money coming from that too, unless you do not use cash.

BTW, this whole philosophical discussion has no meaning, because chain analysis is totally flawed and cannot determine shit.  Relying on them for your coinjoins is the dumbest idea known to Bitcoin's privacy history which is what we are all trying to tell you 50 pages now.