Llama And Other Annoying English Grammar

Does Grammar annoy you? Like many of my friends and others I know, they hate it including my English teacher. Why does llama have two L's in it? Why do we have to put an extra s on plural things that already have s's on them like the Thomas's rode giant worms? Why do run on sentences matter? Why can't we have a less complicated English class? Why asking all these questions? Because I want the answer along with many people. There's one answer. Grammar sucks. But text talk annoys me too...