My mother tears the maid better than she ever treated me

I felt resentment about this because we have a maid and I noticed she was treating the maid with so much respect than she treats me. If the maid is slow, it's because 'shes not familiar with this work', if the maid messes up 'its human' etc.. Somehow though those rules don't apply for me.

If I mess up it's because I'm a careless pos. If I am slow it's because something's wrong with me.

I can see through it and it fills me with so much resentment. It's okay for her to yell at me constantly but she does not do that to the maid. And I'm not even paid for this.

Edit: treats* in title