Really? The movie ruined the books? Because my books survived all three movies with no textual changes...I must be lucky!
Seriously, though, were the movies that bad? Are those people that annoying? The book hasn't been ruined, you just have some new folks to avoid. As has been stated multiple times before, both on this thread and elsewhere, the know-it-all annoying people will eventually leave (if some haven't already) and inhabit and drive another fandom crazy. But the books will remain the same. So relax!