I see you have already been downvoted heavily. But I feel that despite being completely wrong you were attempting a real rebuttal, with real thought and content.
Companies colluding to fix wages - This couldn't exist without the companies trusting each other.
monopolies - These don't need trust between customers and business. But they also represent a failure mode were capitalism breaks down... perhaps because customers don't trust vendors.
Wage theft - This can't go on long before the people earning those wages leave for a more trustworthy environment. There are plenty of examples of people switching jobs (or even countries) to get a more trustworthy employer to prevent this. It is far from perfect, but people generally don't like to be stolen from. Those that tolerate make life harder for those victims that don't.
Discrimination - I am not sure what this has to do with anything here. But even groups like the KKK have trust between member to not out each other. It is fucked up but trust does exist and enables them to operate.
Sweatshops - People wouldn't work in sweatshops if they didn't get paid, otherwise its called slavery. In slavery the slaves aren't economic participants, they are products. Even in slave trades there must be trust. The slavers trust they can sell and the consumers trust they they can buy. This sadly comes with all the assurances of quality that any other transaction comes with.
Child labor - Is very sad, but still requires trust. The kids were either bought/sold so again the slave transaction or the kids are employees and have the employer/employee relationship.
All capitalism requires trust. I never said blind trust, and never trust in the product beyond its ability to function. You cannot buy things from or sell things to someone you do not trust to not attempt to kill you as the most base level. The more valuable or nuanced the transaction the greater the trust required.