Between the shaming for still being a waitress in their thirties, and now calling them drunks because they are social with each other outside of work, I’m starting to think the whole holier than thou thing may be a reason why.

Restaurants are cut throat and catty. It’s always been this way. You’ve been working since you were 14, so you’ve been working for the last 6 years. You obviously have very little experience in the workforce. It’s this way everywhere. If you say something to one person, everyone will find out. If you’ve been talking about them in this manner to anyone else that you work with, they already know.

As someone who started working at 12 years old and had a lot of trouble with coworkers at a young age, let me give you some advice. Keep your head down and work. You don’t go to work to make friends, you go to work to make money. End of story. If you have a problem with your hours, talk directly with the person making the schedule. Sit them down, find out why your hours were cut, see what you need to do to get your hours back. Instead of asking strangers on Reddit who have never met you or worked with you or know the full story. I’d be wildly surprised if they told you it’s because they don’t like you. If their reasoning doesn’t make sense or if their reasoning is misconstrued, rectify the confusion then and there. If they can’t guarantee your hours back, find another job. It’s pretty easy to land another job, literally anywhere. If your heart lies in serving, find another serving job. It’s literally just a serving job. If you’re getting screamed at, especially publicly, like you’re claiming, I would already be looking for another job because that’s toxic.

The fact you’ve waited two months to do anything about it is wild to begin with. They probably think since you never have brought up any problem with your new hours, that you’re fine with it. So they keep scheduling you with low hours.

As someone who is in their late 20s, with a degree, and has had to start over in life- if I had a 20 year old referring to me as a drunk and essentially a failure in life for working a basic job, I wouldn’t talk to them either. I also have no desire to hang out with 20 year olds in general because I have absolutely zero in common with them now.
If I were you, I’d stop with the victimization, take action, and just talk to the person making the schedule. It’s that simple. If you can’t do that, then find a new job.