Job interview put me on a wait list. My grandma could not comprehend this.

I've been struggling with these job applications. I'd really rather stay home than jump through all these loops. Car recently started having issues and other things keep popping up, so I've been applying. Yall. It was so disheartening. I had to drive almost 2 hours one way, for a job that would have been local, for this interview. Car was acting funny. Couldn't sleep the night before as I was anxious. Interview seemed to go well, and then they tell me the job "is filled" and that they put me on a wait list with other people. Told me to contact again about if anything "opens up" I could scream. My grandma was so dumbfounded as she's never heard of that and doesn't understand why they had me come in, to waste my time?! To collect resumes?! Had a different interview at a different company this week and there was no communication from the recruiter, no info on what area to go to (place was massive) and no one had any idea who I was or that I was coming. Finally, I get in and the interviewer was 15 minutes late. Basically tells me that I'd be doing all this stuff that was not on the job description- including that I would have to taxi people around, alone. Seriously spiraling again into my whole depressed, why bother even trying? Just let me sit at home and stay a NEET (other than ebay, which is in it's slow season). It's so draining.