You should know by now not to listen to o_e_l_e_o, he will say any lie necessary about open source privacy software in order to trick people into losing their money to a custodian instead. There is no "flaw", stop FUDing and start verifying:
He doesn't say that the code of Wasabi's open-source software is bad, he says that it's bad to use Wasabi's coordinator because you partner with BA companies. If I run my own coordinator without partnering BA analysis companies and won't filter transactions, then yes, problem will be solved. No one says that the open-source of project is bad. I think it's clear what's the issue here and why do you pretend like there doesn't exist any issue. Move away from BA companies and no one will complain anything about Wasabi if it remains open-source and transparent.