That's quite of a big assumption to make.
It would have been an assumption if I said "only me and you trying to coinjoin this round", which I did not, it was merely an example to explain how user X could detect that user Y is being targeted in Sybil attack.
A sybil attack is obviously not an exclusive perk of Wasabi;
Great then, it shouldn't be used against Wasabi, unless there exists a valid proof that they are doing it themselves, which nobody has come up with yet as far as I am concerned.
You're also making the wild assumption that the remaining clients will be concerned about experiencing a sybil attack. Anyone choosing to use Wasabi after the extensive list of red flags would be the least likely to worry about being sybil attacked.
If the "remaining clients" are not concerned about their privacy then why use a coinjoin in the first place? it seems like you are making an even wilder assumption thinking that everyone using Wasabi is a newbie jerk who doesn't care if their not-so-private coins become 100% KYCed.
Also, all the research and money spent by competitors isn't enough? Have you seen how hard the Samouri team is trying to find the smallest flaw in Wasabi? it would cost them less to monitor Wasabi than it would cost Wasabi to launch continuous Sybil attacks.
I do understand the anger and hate against Wasabi, I personally hated the fact that they took this path, but the chainanalysis/censorship isn't a concern to many people, in fact, their volume over the last year is higher than it was before the censorship, could it be fake? of course, but are there a dozen people out there who don't care about Bitcoin fungibility? indeed, is everyone using Wasabi stupid? I'd say no, should anyone use Wasabi? NO, are there better options? Yes.