Quiting a job ?

I feel like just quitting my job all together. We had 1 meeting in front of the whole staff about me (which could’ve pulled me aside) . & another private meeting. I work for customer service and they all of sudden want me to catch up on training (because owners are going out of the country) after 5 months of working there (isn’t my fault due to poor management) just sticking me on one thing 24/7. Idk how I went from being 110% oh I’m doing great to just nit picking at every little thing… I can’t answer questions to something that I haven’t been trained on. I’ve had the “manager” tell me if She fires me “I’ll loose everything” & basically just throwing her title around. There starting to pile me with overloads of work which is stressing. I’m not getting paid as promised the 14 hr after my 90 days. I’m still getting paid 10. Overall I feel like I shouldn’t stress myself over a job … & over the ignorant emails having to respect someone when it’s it given. Sorry this is all over the place but I’m super annoyed . I have an interview Friday with a job I really want ! Will I be wrong to just make tomorrow my last day ?