Things I hate about my first job

I started my "first job" exactly a week and 3days ago. It's not my real first job, I'm not on the pay list,so. I'm learning a lot and this is an extra but my word,does it suck? I can't figure out if "my boss" hates me because I'm taking up a lot of o2 by just being here OR because of the scared shitless look I have on my face every time he walks by
  1. My boss hates me.
  2. Nobody knocks when the toilet is occupied
    I do
  3. I battle to lock the toilet door
  4. My boss hates me
  5. I can't break into song
  6. I drink way too much coffee.
  7. I'm constantly starving
  8. It's my first job.