I'm going to leave work early even though I'm not sick
Why are you leaving so early? Do you hate your job?
Yes, I hate my job, I am fed up of working for someone who's always giving me orders.
You shouldn't leave work early.
That's a part of the plan to make my boss feel bad. I want to make them feel really bad and doubt the job that I do.
If you are that unhappy with your job, then you should start looking for a new one. This current behavior does not help your situation.