Why is my mom so annoying?

Now, I know what you're all thinking.. I am being way too harsh because shes my mom and she loves me and she just wants the best for me. But, you have no idea.. Every single day I strain myself from tearing her to pieces. I don't have anger issues or anything but ughh its like she is intentionally trying to torture me. First of all, she is like actually stupid. Like, sometimes I can't even understand what she is saying. Even this morning she went off on a rant about how I was a disgrace for eating leftovers from last nights dinner for breakfast.. And, then that complaint led to another complaint about how I had to clean my room, which led to another about how she was so stressed about her work. And, this brings me to another thing. every time my mom opens her mouth she does nothing but complain. I constantly CONSTANTLY hear her moaning or murmuring to herself. She uses her work as an excuse for everything when I often catch her just sleeping or watching tv. I argue with her a lot over the stupidest things and ughh horrible, horrible.