Yep, ChipMixer is one among many "mixing sites" that scammed an enormous amount of Bitcoin and ended up turning over their customer's data to the government anyway. Only coinjoins give you the guarantee of privacy without trusting third parties.
ChipMixer did not scam their customers, neither did they "hand over" customer's data to the government. ChipMixer were provably taken down by authorities and their servers as well as 7TB of data we don't know what's in it was seized. There is a different between a playform being taken down by authorities and one that scams or rug-pulls customers.