hey,
waitressing jobs are hard. and they are like a rite of passage. it seems everyone has to do at least one in their lifetime.

is this the same pizza place you wrote about before?
is this your first job?

"knowing " you have seasonal jobs lined up and "having" them are 2 different things.

personally while you may hate this job, it is a job..that pays. cash...something we all need. mom can only cover so much, and only should.

you are not going to like what I suggest but..i would stay with the job. yea it sucks, but it is work experience. there is no promise that your next one will be any better. welcome to customer service. dealing with people is always a crap shoot. kids throw up, bleed, yell, etc. it's why they call it "customer" service. learning to deal with it now will make your life easier in the long run..trust me. unless you do some weird job where you work in a closed office on computer stuff there is always going to be interaction with other people. learning to manage them is a skill everyone needs to con quer.

your body size will probably stay the same. I would suggest you learn how to better handle to tasks you need for the job. there is no promise the next job won't have you stacking things. I am very short and have asthma..i had to learn to work around my height and lungs to perform my duties. certain things can be adapted but if you accept a position they can not be expected to totally changer the entire skill set for you.

as for the yelling etc...if I recall you complained once before about them because of your hearing. maybe they yell because of that. maybe they assume you can't hear the hello/goodbyes? maybe they are as frustrated as you are and it isn't a good fit all around...given that...

screwing up enough to get fired….so not a good idea....great. no $$, no job. be the grown up keep working. when you need a work reference if they have to call that place you can bet it won't be a good one. staying, working until you get another position shows maturity.

just out of curiosity..why did you accept this position anyway? did you think you could handle the work?

everyone has had sucky jobs. trust me. it shouldn't be a reason for suicidal thoughts, it is just a job. go in, do the work, get the check, and keep applying .
you will find something else, but it is better to have a check and not depend on someone for $$ while you wait.