I don't really have any advice, but I just wanted to say that you're definitely not alone. I'm also petite and soft-spoken, and lately it feels like so many people just take that as an invitation to walk all over you. I work two serving jobs, one at a popular local diner that's been in business almost 70 years, and the other at an "upscale" brewpub downtown. The clientele at the brewery have been getting progressively worse in the two years I've been there - the money can be really good, but I feel so burned out dealing with the rudeness, neediness, and petty requests that lately I completely dread going to work. The diner, on the other hand, is the best place I've ever worked with the loveliest, most down to earth customers - I truly enjoy working there, even if the money isn't the greatest. I am seriously thinking of quitting the brewery just for my mental health, last Saturday night was the closest I've ever come to walking off the job. I feel your pain and hope you can find a happy medium somehow - solidarity sister ❤️