Most coins like btc, eth, doge, and almost all top coins are transparent and therefore not fungible. A tainted coin will not be worth the same as a clean coin as the usability is inversely correlated to taint. Further complicating is the seriousness of the taint and the proximity of the taint to the original problem. So even if you know the coin is tainted, its very complicated to work out how badly it is tainted and what the actual value could be.
So my question is how do I know the coins I am receiving for my xmr are not tainted on decentralized solutions like atomic swaps, bisq, haveno, etc?