Starshine, whoever said that to you clearly has no idea of what is actually taught in English lessons.
You are teaching the art of communication, self expression and textual analysis; not just of fictional prose, poetry and drama, but of factual media. You are enabling pupils to make sense of the world around them and respond to that world sensitively, intelligently and articulately. English is not just spelling and grammar. If that's all the people you speak to 'got' from their English lessons at school, then they really weren't listening!
When you reach GCSE and A Level, obviously your ability to teach texts at a more complex and in-depth level increases. There are plenty of opportunities to study literatures from other cultures and introduce theories such as post-colonialism, feminism, postmodernism, etc to those students who are more able and willing to push themselves and read around the set texts. Finding the curriculum 'boring' is down to the way you approach it, I suppose. I understand where you're coming from; I would love to do my MA and PhD and am a freelance writer/academic in my spare time, so my knowledge of literature is quite advanced. I could have pursued an academic career, but ultimately I think secondary teaching has so much more to it from the pastoral side of things, which is what makes it so rewarding. Plus, there is a lot of richness to be had from being able to open students' eyes to the wonders of literature for the first time and getting them to read between the lines in ways they have never thought of doing before. You'd be surprised at what perceptive observations students can have - even at the age of 11 - and what new perspectives they can give you on texts you thought you knew like the back of your hand. It's actually more of a challenge, I think, to go 'back to basics' and find creative and accessible ways for students to enjoy literature at the level they are at. It really keeps you on your toes.
Teaching English is a hard job - it covers so many different skills - and you really do need a degree in the subject in order to have the knowledge base required for the job. If you can't adequately analyse and interpret a text, how on earth could you a teach a class to do so? Intelligent, knowledgable and passionate English teachers are a precious commodity, and if this is what you want, go for it. You can always do your MA and PhD later in life - and in the meantime, hundreds of kids would have benefited from you teaching them to love literature and language, and you'd have a job you love!!