Hate my job😑😠

I fucking hate my job! They have me working just 4 hours under 3/4 time and won't bump me up because they don't want to cover me with insurance or anything. Yet I am the only o e that ever fucking works?! My 1 CO worker only is allowed 9 hours because of college and if she gets more she looses her scholarship. And my other coworker has a second job and only works 1-2 days a week. My hours are 8-5 or 5:30 almost every single day and those hours make it to where I can't get a morning job or a night job because I won't get sleep. My manager treats my other coworker SO much better than me. I told her my new meds will make me tired and sick and she said "sounds like a normal day for you, get over it". I was like bitch I was just letting you know, I wasn't complaining. They make me feel stupid and worthless. I have been applying for other jobs for months now and haven't gotten a single one. I just want to be done here!! 😑