From the way they vehemently oppose any attempt at changing the tipping culture, I’d say they collectively are partly responsible for not being paid a minimum wage.

The vast majority of jobs are not tipped positions, including food service jobs.

So of you aren’t gonna do your job well enough that people tip decently, maybe look elsewhere. Given performance is not a one to one, some people are shitty tippers no matter the service, but if you half ass a tip based job your gonna have a bad time, and yes blame falls on the worker too at that point.